gh-102255: Improve build support for Windows API partitions (GH-102256)

Add `MS_WINDOWS_DESKTOP`, `MS_WINDOWS_APPS`, `MS_WINDOWS_SYSTEM` and `MS_WINDOWS_GAMES` preprocessor definitions to allow switching off functionality missing from particular API partitions ("partitions" are used in Windows to identify overlapping subsets of APIs).
CPython only officially supports `MS_WINDOWS_DESKTOP` and `MS_WINDOWS_SYSTEM` (APPS is included by normal desktop builds, but APPS without DESKTOP is not covered). Other configurations are a convenience for people building their own runtimes.
`MS_WINDOWS_GAMES` is for the Xbox subset of the Windows API, which is also available on client OS, but is restricted compared to `MS_WINDOWS_DESKTOP`. These restrictions may change over time, as they relate to the build headers rather than the OS support, and so we assume that Xbox builds will use the latest available version of the GDK.

36 files changed, 633 insertions, 100 deletions

diff --git a/Include/internal/pycore_fileutils.h b/Include/internal/pycore_fileutils.h
index f8e2bf2..445ac0a 100644
--- a/Include/internal/pycore_fileutils.h
+++ b/Include/internal/pycore_fileutils.h
@@ -251,6 +251,14 @@ extern int _Py_add_relfile(wchar_t *dirname,
 extern size_t _Py_find_basename(const wchar_t *filename);
 PyAPI_FUNC(wchar_t *) _Py_normpath(wchar_t *path, Py_ssize_t size);
 
+// The Windows Games API family does not provide these functions
+// so provide our own implementations. Remove them in case they get added
+// to the Games API family
+#if defined(MS_WINDOWS_GAMES) && !defined(MS_WINDOWS_DESKTOP)
+#include <winerror.h>
+
+extern HRESULT PathCchSkipRoot(const wchar_t *pszPath, const wchar_t **ppszRootEnd);
+#endif /* defined(MS_WINDOWS_GAMES) && !defined(MS_WINDOWS_DESKTOP) */
 
 // Macros to protect CRT calls against instant termination when passed an
 // invalid parameter (bpo-23524). IPH stands for Invalid Parameter Handler.
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 792794c..ba6feb6 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -3084,11 +3084,13 @@ class DeviceEncodingTests(unittest.TestCase):
 class PidTests(unittest.TestCase):
     @unittest.skipUnless(hasattr(os, 'getppid'), "test needs os.getppid")
     def test_getppid(self):
-        p = subprocess.Popen([sys.executable, '-c',
+        p = subprocess.Popen([sys._base_executable, '-c',
                               'import os; print(os.getppid())'],
-                             stdout=subprocess.PIPE)
-        stdout, _ = p.communicate()
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE)
+        stdout, error = p.communicate()
         # We are the parent of our subprocess
+        self.assertEqual(error, b'')
         self.assertEqual(int(stdout), os.getpid())
 
     def check_waitpid(self, code, exitcode, callback=None):
diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-02-26-11-43-56.gh-issue-102255.cRnI5x.rst b/Misc/NEWS.d/next/Core and Builtins/2023-02-26-11-43-56.gh-issue-102255.cRnI5x.rst
new file mode 100644
index 0000000..daabc3c
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2023-02-26-11-43-56.gh-issue-102255.cRnI5x.rst
@@ -0,0 +1 @@
+Improve build support for the Xbox. Patch by Max Bachmann.
diff --git a/Modules/_io/_iomodule.c b/Modules/_io/_iomodule.c
index d8d836b..1506755 100644
--- a/Modules/_io/_iomodule.c
+++ b/Modules/_io/_iomodule.c
@@ -317,7 +317,7 @@ _io_open_impl(PyObject *module, PyObject *file, const char *mode,
     _PyIO_State *state = get_io_state(module);
     {
         PyObject *RawIO_class = (PyObject *)state->PyFileIO_Type;
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
         const PyConfig *config = _Py_GetConfig();
         if (!config->legacy_windows_stdio && _PyIO_get_console_type(path_or_fd) != '\0') {
             RawIO_class = (PyObject *)&PyWindowsConsoleIO_Type;
@@ -660,7 +660,7 @@ static PyTypeObject* static_types[] = {
 
     // PyRawIOBase_Type(PyIOBase_Type) subclasses
     &_PyBytesIOBuffer_Type,
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
     &PyWindowsConsoleIO_Type,
 #endif
 };
@@ -718,7 +718,7 @@ PyInit__io(void)
     }
 
     // Set type base classes
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
     PyWindowsConsoleIO_Type.tp_base = &PyRawIOBase_Type;
 #endif
 
diff --git a/Modules/_io/_iomodule.h b/Modules/_io/_iomodule.h
index 02daef9..d7224e5 100644
--- a/Modules/_io/_iomodule.h
+++ b/Modules/_io/_iomodule.h
@@ -26,9 +26,9 @@ extern PyType_Spec fileio_spec;
 extern PyType_Spec stringio_spec;
 extern PyType_Spec textiowrapper_spec;
 
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
 extern PyTypeObject PyWindowsConsoleIO_Type;
-#endif /* MS_WINDOWS */
+#endif /* HAVE_WINDOWS_CONSOLE_IO */
 
 /* These functions are used as METH_NOARGS methods, are normally called
  * with args=NULL, and return a new reference.
@@ -178,7 +178,7 @@ find_io_state_by_def(PyTypeObject *type)
 
 extern _PyIO_State *_PyIO_get_module_state(void);
 
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
 extern char _PyIO_get_console_type(PyObject *);
 #endif
 
diff --git a/Modules/_io/clinic/winconsoleio.c.h b/Modules/_io/clinic/winconsoleio.c.h
index df834db..4c5cd08 100644
--- a/Modules/_io/clinic/winconsoleio.c.h
+++ b/Modules/_io/clinic/winconsoleio.c.h
@@ -8,7 +8,7 @@ preserve
 #endif
 
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_close__doc__,
 "close($self, /)\n"
@@ -31,9 +31,9 @@ _io__WindowsConsoleIO_close(winconsoleio *self, PyObject *Py_UNUSED(ignored))
     return _io__WindowsConsoleIO_close_impl(self);
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO___init____doc__,
 "_WindowsConsoleIO(file, mode=\'r\', closefd=True, opener=None)\n"
@@ -131,9 +131,9 @@ exit:
     return return_value;
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_fileno__doc__,
 "fileno($self, /)\n"
@@ -153,9 +153,9 @@ _io__WindowsConsoleIO_fileno(winconsoleio *self, PyObject *Py_UNUSED(ignored))
     return _io__WindowsConsoleIO_fileno_impl(self);
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_readable__doc__,
 "readable($self, /)\n"
@@ -175,9 +175,9 @@ _io__WindowsConsoleIO_readable(winconsoleio *self, PyObject *Py_UNUSED(ignored))
     return _io__WindowsConsoleIO_readable_impl(self);
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_writable__doc__,
 "writable($self, /)\n"
@@ -197,9 +197,9 @@ _io__WindowsConsoleIO_writable(winconsoleio *self, PyObject *Py_UNUSED(ignored))
     return _io__WindowsConsoleIO_writable_impl(self);
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_readinto__doc__,
 "readinto($self, buffer, /)\n"
@@ -239,9 +239,9 @@ exit:
     return return_value;
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_readall__doc__,
 "readall($self, /)\n"
@@ -263,9 +263,9 @@ _io__WindowsConsoleIO_readall(winconsoleio *self, PyObject *Py_UNUSED(ignored))
     return _io__WindowsConsoleIO_readall_impl(self);
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_read__doc__,
 "read($self, size=-1, /)\n"
@@ -305,9 +305,9 @@ exit:
     return return_value;
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_write__doc__,
 "write($self, b, /)\n"
@@ -348,9 +348,9 @@ exit:
     return return_value;
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
-#if defined(MS_WINDOWS)
+#if defined(HAVE_WINDOWS_CONSOLE_IO)
 
 PyDoc_STRVAR(_io__WindowsConsoleIO_isatty__doc__,
 "isatty($self, /)\n"
@@ -370,7 +370,7 @@ _io__WindowsConsoleIO_isatty(winconsoleio *self, PyObject *Py_UNUSED(ignored))
     return _io__WindowsConsoleIO_isatty_impl(self);
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* defined(HAVE_WINDOWS_CONSOLE_IO) */
 
 #ifndef _IO__WINDOWSCONSOLEIO_CLOSE_METHODDEF
     #define _IO__WINDOWSCONSOLEIO_CLOSE_METHODDEF
@@ -407,4 +407,4 @@ _io__WindowsConsoleIO_isatty(winconsoleio *self, PyObject *Py_UNUSED(ignored))
 #ifndef _IO__WINDOWSCONSOLEIO_ISATTY_METHODDEF
     #define _IO__WINDOWSCONSOLEIO_ISATTY_METHODDEF
 #endif /* !defined(_IO__WINDOWSCONSOLEIO_ISATTY_METHODDEF) */
-/*[clinic end generated code: output=4920e9068e0cf08a input=a9049054013a1b77]*/
+/*[clinic end generated code: output=163e934aa9b0ef16 input=a9049054013a1b77]*/
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index 35a498c..1118d86 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -37,7 +37,9 @@
 #ifdef MS_WINDOWS
 /* can simulate truncate with Win32 API functions; see file_truncate */
 #define HAVE_FTRUNCATE
+#ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
+#endif
 #include <windows.h>
 #endif
 
diff --git a/Modules/_io/winconsoleio.c b/Modules/_io/winconsoleio.c
index de07b50..f836e23 100644
--- a/Modules/_io/winconsoleio.c
+++ b/Modules/_io/winconsoleio.c
@@ -11,7 +11,7 @@
 #include "pycore_fileutils.h"     // _Py_BEGIN_SUPPRESS_IPH
 #include "pycore_object.h"        // _PyObject_GC_UNTRACK()
 
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
 
 #include "structmember.h"         // PyMemberDef
 #ifdef HAVE_SYS_TYPES_H
@@ -22,7 +22,9 @@
 #endif
 #include <stddef.h> /* For offsetof */
 
+#ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
+#endif
 #include <windows.h>
 #include <fcntl.h>
 
@@ -1177,4 +1179,4 @@ PyTypeObject PyWindowsConsoleIO_Type = {
     0,                                          /* tp_finalize */
 };
 
-#endif /* MS_WINDOWS */
+#endif /* HAVE_WINDOWS_CONSOLE_IO */
diff --git a/Modules/_localemodule.c b/Modules/_localemodule.c
index 23c38e1..96675cd 100644
--- a/Modules/_localemodule.c
+++ b/Modules/_localemodule.c
@@ -35,7 +35,9 @@ This software comes with no warranty. Use at your own risk.
 #endif
 
 #if defined(MS_WINDOWS)
+#ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
+#endif
 #include <windows.h>
 #endif
 
@@ -457,12 +459,12 @@ _locale__getdefaultlocale_impl(PyObject *module)
 
     PyOS_snprintf(encoding, sizeof(encoding), "cp%u", GetACP());
 
-    if (GetLocaleInfo(LOCALE_USER_DEFAULT,
+    if (GetLocaleInfoA(LOCALE_USER_DEFAULT,
                       LOCALE_SISO639LANGNAME,
                       locale, sizeof(locale))) {
         Py_ssize_t i = strlen(locale);
         locale[i++] = '_';
-        if (GetLocaleInfo(LOCALE_USER_DEFAULT,
+        if (GetLocaleInfoA(LOCALE_USER_DEFAULT,
                           LOCALE_SISO3166CTRYNAME,
                           locale+i, (int)(sizeof(locale)-i)))
             return Py_BuildValue("ss", locale, encoding);
@@ -474,7 +476,7 @@ _locale__getdefaultlocale_impl(PyObject *module)
 
     locale[0] = '0';
     locale[1] = 'x';
-    if (GetLocaleInfo(LOCALE_USER_DEFAULT, LOCALE_IDEFAULTLANGUAGE,
+    if (GetLocaleInfoA(LOCALE_USER_DEFAULT, LOCALE_IDEFAULTLANGUAGE,
                       locale+2, sizeof(locale)-2)) {
         return Py_BuildValue("ss", locale, encoding);
     }
diff --git a/Modules/_multiprocessing/multiprocessing.h b/Modules/_multiprocessing/multiprocessing.h
index b595e5a..dfc2a8e 100644
--- a/Modules/_multiprocessing/multiprocessing.h
+++ b/Modules/_multiprocessing/multiprocessing.h
@@ -12,7 +12,9 @@
  */
 
 #ifdef MS_WINDOWS
-#  define WIN32_LEAN_AND_MEAN
+#  ifndef WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
+#  endif
 #  include <windows.h>
 #  include <winsock2.h>
 #  include <process.h>               /* getpid() */
diff --git a/Modules/_pickle.c b/Modules/_pickle.c
index 1b34977..a26732a 100644
--- a/Modules/_pickle.c
+++ b/Modules/_pickle.c
@@ -42,6 +42,12 @@ enum {
 #define FLOAT FLOAT_
 #define INT INT_
 #define LONG LONG_
+
+/* This can already be defined on Windows to set the character set
+   the Windows header files treat as default */
+#ifdef UNICODE
+#undef UNICODE
+#endif
 #endif
 
 /* Pickle opcodes. These must be kept updated with pickle.py.
diff --git a/Modules/_randommodule.c b/Modules/_randommodule.c
index 68060c0..6e22053 100644
--- a/Modules/_randommodule.c
+++ b/Modules/_randommodule.c
@@ -77,6 +77,10 @@
 #  include <process.h>            // getpid()
 #endif
 
+#ifdef MS_WINDOWS
+#  include <windows.h>
+#endif
+
 /* Period parameters -- These are all magic.  Don't change. */
 #define N 624
 #define M 397
@@ -259,7 +263,7 @@ random_seed_time_pid(RandomObject *self)
     key[0] = (uint32_t)(now & 0xffffffffU);
     key[1] = (uint32_t)(now >> 32);
 
-#ifdef MS_WINDOWS_NON_DESKTOP
+#if defined(MS_WINDOWS) && !defined(MS_WINDOWS_DESKTOP) && !defined(MS_WINDOWS_SYSTEM)
     key[2] = (uint32_t)GetCurrentProcessId();
 #elif defined(HAVE_GETPID)
     key[2] = (uint32_t)getpid();
diff --git a/Modules/_ssl.c b/Modules/_ssl.c
index 8f03a84..2811231 100644
--- a/Modules/_ssl.c
+++ b/Modules/_ssl.c
@@ -28,6 +28,10 @@
 /* Include symbols from _socket module */
 #include "socketmodule.h"
 
+#ifdef MS_WINDOWS
+#  include <wincrypt.h>
+#endif
+
 #include "_ssl.h"
 
 /* Redefined below for Windows debug builds after important #includes */
diff --git a/Modules/_winapi.c b/Modules/_winapi.c
index eefc257..83cde75 100644
--- a/Modules/_winapi.c
+++ b/Modules/_winapi.c
@@ -39,8 +39,11 @@
 #include "structmember.h"         // PyMemberDef
 
 
+#ifndef WINDOWS_LEAN_AND_MEAN
 #define WINDOWS_LEAN_AND_MEAN
+#endif
 #include "windows.h"
+#include <winioctl.h>
 #include <crtdbg.h>
 #include "winreparse.h"
 
@@ -63,6 +66,14 @@
 
 #define T_HANDLE T_POINTER
 
+// winbase.h limits the STARTF_* flags to the desktop API as of 10.0.19041.
+#ifndef STARTF_USESHOWWINDOW
+#define STARTF_USESHOWWINDOW 0x00000001
+#endif
+#ifndef STARTF_USESTDHANDLES
+#define STARTF_USESTDHANDLES 0x00000100
+#endif
+
 typedef struct {
     PyTypeObject *overlapped_type;
 } WinApiState;
@@ -1201,8 +1212,10 @@ _winapi_ExitProcess_impl(PyObject *module, UINT ExitCode)
 /*[clinic end generated code: output=a387deb651175301 input=4f05466a9406c558]*/
 {
     #if defined(Py_DEBUG)
+#ifdef MS_WINDOWS_DESKTOP
         SetErrorMode(SEM_FAILCRITICALERRORS|SEM_NOALIGNMENTFAULTEXCEPT|
                      SEM_NOGPFAULTERRORBOX|SEM_NOOPENFILEERRORBOX);
+#endif
         _CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG);
     #endif
 
diff --git a/Modules/clinic/posixmodule.c.h b/Modules/clinic/posixmodule.c.h
index dcd25c2..6565f8d 100644
--- a/Modules/clinic/posixmodule.c.h
+++ b/Modules/clinic/posixmodule.c.h
@@ -10988,7 +10988,7 @@ exit:
 
 #endif /* defined(HAVE_GETRANDOM_SYSCALL) */
 
-#if defined(MS_WINDOWS)
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM))
 
 PyDoc_STRVAR(os__add_dll_directory__doc__,
 "_add_dll_directory($module, /, path)\n"
@@ -11057,9 +11057,9 @@ exit:
     return return_value;
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)) */
 
-#if defined(MS_WINDOWS)
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM))
 
 PyDoc_STRVAR(os__remove_dll_directory__doc__,
 "_remove_dll_directory($module, /, cookie)\n"
@@ -11120,7 +11120,7 @@ exit:
     return return_value;
 }
 
-#endif /* defined(MS_WINDOWS) */
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)) */
 
 #if (defined(WIFEXITED) || defined(MS_WINDOWS))
 
@@ -11796,4 +11796,4 @@ exit:
 #ifndef OS_WAITSTATUS_TO_EXITCODE_METHODDEF
     #define OS_WAITSTATUS_TO_EXITCODE_METHODDEF
 #endif /* !defined(OS_WAITSTATUS_TO_EXITCODE_METHODDEF) */
-/*[clinic end generated code: output=1b0eb6a76b1a0e28 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=9495478e51701b8a input=a9049054013a1b77]*/
diff --git a/Modules/errnomodule.c b/Modules/errnomodule.c
index 4de4144..df4e494 100644
--- a/Modules/errnomodule.c
+++ b/Modules/errnomodule.c
@@ -5,7 +5,9 @@
 
 /* Windows socket errors (WSA*)  */
 #ifdef MS_WINDOWS
+#ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN
+#endif
 #include <windows.h>
 /* The following constants were added to errno.h in VS2010 but have
    preferred WSA equivalents. */
diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index 5309a37..bfe35fe 100644
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -953,7 +953,7 @@ faulthandler_unregister_py(PyObject *self, PyObject *args)
 static void
 faulthandler_suppress_crash_report(void)
 {
-#ifdef MS_WINDOWS
+#ifdef MS_WINDOWS_DESKTOP
     UINT mode;
 
     /* Configure Windows to not display the Windows Error Reporting dialog */
diff --git a/Modules/getpath.c b/Modules/getpath.c
index c807a3c..2f20521 100644
--- a/Modules/getpath.c
+++ b/Modules/getpath.c
@@ -745,10 +745,12 @@ static int
 library_to_dict(PyObject *dict, const char *key)
 {
 #ifdef MS_WINDOWS
+#ifdef Py_ENABLE_SHARED
     extern HMODULE PyWin_DLLhModule;
     if (PyWin_DLLhModule) {
         return winmodule_to_dict(dict, key, PyWin_DLLhModule);
     }
+#endif
 #elif defined(WITH_NEXT_FRAMEWORK)
     static char modPath[MAXPATHLEN + 1];
     static int modPathInitialized = -1;
diff --git a/Modules/mmapmodule.c b/Modules/mmapmodule.c
index 6054c28..fe76ca6 100644
--- a/Modules/mmapmodule.c
+++ b/Modules/mmapmodule.c
@@ -29,6 +29,10 @@
 #include "structmember.h"         // PyMemberDef
 #include <stddef.h>               // offsetof()
 
+// to support MS_WINDOWS_SYSTEM OpenFileMappingA / CreateFileMappingA
+// need to be replaced with OpenFileMappingW / CreateFileMappingW
+#if !defined(MS_WINDOWS) || defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_GAMES)
+
 #ifndef MS_WINDOWS
 #define UNIX
 # ifdef HAVE_FCNTL_H
@@ -647,7 +651,7 @@ mmap_flush_method(mmap_object *self, PyObject *args)
     if (self->access == ACCESS_READ || self->access == ACCESS_COPY)
         Py_RETURN_NONE;
 
-#ifdef MS_WINDOWS
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)
     if (!FlushViewOfFile(self->data+offset, size)) {
         PyErr_SetFromWindowsErr(GetLastError());
         return NULL;
@@ -1724,3 +1728,5 @@ PyInit_mmap(void)
 {
     return PyModuleDef_Init(&mmapmodule);
 }
+
+#endif /* !MS_WINDOWS || MS_WINDOWS_DESKTOP || MS_WINDOWS_GAMES */
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index a3d86cb..0d534f3 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -26,11 +26,15 @@
 
 #ifdef MS_WINDOWS
 #  include <windows.h>
-#  include <pathcch.h>
+#  if !defined(MS_WINDOWS_GAMES) || defined(MS_WINDOWS_DESKTOP)
+#    include <pathcch.h>
+#  endif
 #  include <winioctl.h>
 #  include <lmcons.h>             // UNLEN
 #  include "osdefs.h"             // SEP
-#  define HAVE_SYMLINK
+#  if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
+#    define HAVE_SYMLINK
+#  endif /* MS_WINDOWS_DESKTOP | MS_WINDOWS_SYSTEM */
 #endif
 
 #include "structmember.h"         // PyMemberDef
@@ -311,7 +315,7 @@ corresponding Unix manual entries for more information on calls.");
 #  include <sys/syscall.h>
 #endif
 
-#if defined(MS_WINDOWS)
+#ifdef HAVE_WINDOWS_CONSOLE_IO
 #  define TERMSIZE_USE_CONIO
 #elif defined(HAVE_SYS_IOCTL_H)
 #  include <sys/ioctl.h>
@@ -321,7 +325,7 @@ corresponding Unix manual entries for more information on calls.");
 #  if defined(TIOCGWINSZ)
 #    define TERMSIZE_USE_IOCTL
 #  endif
-#endif /* MS_WINDOWS */
+#endif /* HAVE_WINDOWS_CONSOLE_IO */
 
 /* Various compilers have only certain posix functions */
 /* XXX Gosh I wish these were all moved into pyconfig.h */
@@ -329,21 +333,25 @@ corresponding Unix manual entries for more information on calls.");
 #  define HAVE_OPENDIR    1
 #  define HAVE_SYSTEM     1
 #  include <process.h>
-#else
-#  ifdef _MSC_VER
-     /* Microsoft compiler */
+#elif defined( _MSC_VER)
+  /* Microsoft compiler */
+#  if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)
 #    define HAVE_GETPPID    1
+#  endif /* MS_WINDOWS_DESKTOP | MS_WINDOWS_APP | MS_WINDOWS_SYSTEM */
+#  if defined(MS_WINDOWS_DESKTOP)
 #    define HAVE_GETLOGIN   1
+#  endif /* MS_WINDOWS_DESKTOP */
+#  if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
 #    define HAVE_SPAWNV     1
 #    define HAVE_EXECV      1
 #    define HAVE_WSPAWNV    1
 #    define HAVE_WEXECV     1
-#    define HAVE_PIPE       1
 #    define HAVE_SYSTEM     1
 #    define HAVE_CWAIT      1
-#    define HAVE_FSYNC      1
-#    define fsync _commit
-#  endif  /* _MSC_VER */
+#  endif /* MS_WINDOWS_DESKTOP | MS_WINDOWS_SYSTEM */
+#  define HAVE_PIPE       1
+#  define HAVE_FSYNC      1
+#  define fsync _commit
 #endif  /* ! __WATCOMC__ || __QNX__ */
 
 /*[clinic input]
@@ -1536,7 +1544,7 @@ convertenviron(void)
 #ifdef MS_WINDOWS
     /* _wenviron must be initialized in this way if the program is started
        through main() instead of wmain(). */
-    _wgetenv(L"");
+    (void)_wgetenv(L"");
     e = _wenviron;
 #elif defined(WITH_NEXT_FRAMEWORK) || (defined(__APPLE__) && defined(Py_ENABLE_SHARED))
     /* environ is not accessible as an extern in a shared object on OSX; use
@@ -1785,6 +1793,10 @@ attributes_from_dir(LPCWSTR pszFile, BY_HANDLE_FILE_INFORMATION *info, ULONG *re
     if (n && (pszFile[n - 1] == L'\\' || pszFile[n - 1] == L'/')) {
         // cannot use PyMem_Malloc here because we do not hold the GIL
         filename = (LPCWSTR)malloc((n + 1) * sizeof(filename[0]));
+        if(!filename) {
+            SetLastError(ERROR_NOT_ENOUGH_MEMORY);
+            return FALSE;
+        }
         wcsncpy_s((LPWSTR)filename, n + 1, pszFile, n);
         while (--n > 0 && (filename[n] == L'\\' || filename[n] == L'/')) {
             ((LPWSTR)filename)[n] = L'\0';
@@ -7933,10 +7945,10 @@ static PyObject *
 os_getpid_impl(PyObject *module)
 /*[clinic end generated code: output=9ea6fdac01ed2b3c input=5a9a00f0ab68aa00]*/
 {
-#ifdef MS_WINDOWS_NON_DESKTOP
-    return PyLong_FromUnsignedLong(GetCurrentProcessId());
-#else
+#if !defined(MS_WINDOWS) || defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
     return PyLong_FromPid(getpid());
+#else
+    return PyLong_FromUnsignedLong(GetCurrentProcessId());
 #endif
 }
 #endif /* defined(HAVE_GETPID) */
@@ -8392,6 +8404,7 @@ os_kill_impl(PyObject *module, pid_t pid, Py_ssize_t signal)
     DWORD err;
     HANDLE handle;
 
+#ifdef HAVE_WINDOWS_CONSOLE_IO
     /* Console processes which share a common console can be sent CTRL+C or
        CTRL+BREAK events, provided they handle said events. */
     if (sig == CTRL_C_EVENT || sig == CTRL_BREAK_EVENT) {
@@ -8399,9 +8412,11 @@ os_kill_impl(PyObject *module, pid_t pid, Py_ssize_t signal)
             err = GetLastError();
             PyErr_SetFromWindowsErr(err);
         }
-        else
+        else {
             Py_RETURN_NONE;
+        }
     }
+#endif /* HAVE_WINDOWS_CONSOLE_IO */
 
     /* If the signal is outside of what GenerateConsoleCtrlEvent can use,
        attempt to open and terminate the process. */
@@ -13776,7 +13791,9 @@ os_cpu_count_impl(PyObject *module)
 {
     int ncpu = 0;
 #ifdef MS_WINDOWS
+#ifdef MS_WINDOWS_DESKTOP
     ncpu = GetActiveProcessorCount(ALL_PROCESSOR_GROUPS);
+#endif
 #elif defined(__hpux)
     ncpu = mpctl(MPC_GETNUMSPUS, NULL, NULL);
 #elif defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)
@@ -13848,6 +13865,10 @@ os_set_inheritable_impl(PyObject *module, int fd, int inheritable)
 
 
 #ifdef MS_WINDOWS
+#ifndef HANDLE_FLAG_INHERIT
+#define HANDLE_FLAG_INHERIT 0x00000001
+#endif
+
 /*[clinic input]
 os.get_handle_inheritable -> bool
     handle: intptr_t
@@ -15023,7 +15044,8 @@ error:
 }
 #endif   /* HAVE_GETRANDOM_SYSCALL */
 
-#ifdef MS_WINDOWS
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)
+
 /* bpo-36085: Helper functions for managing DLL search directories
  * on win32
  */
@@ -15114,7 +15136,7 @@ os__remove_dll_directory_impl(PyObject *module, PyObject *cookie)
     Py_RETURN_NONE;
 }
 
-#endif
+#endif /* MS_WINDOWS_APP || MS_WINDOWS_SYSTEM */
 
 
 /* Only check if WIFEXITED is available: expect that it comes
diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
index df4043d..5a1e40d 100644
--- a/Modules/selectmodule.c
+++ b/Modules/selectmodule.c
@@ -57,8 +57,10 @@ extern void bzero(void *, int);
 #endif
 
 #ifdef MS_WINDOWS
-#  define WIN32_LEAN_AND_MEAN
-#  include <winsock.h>
+#  ifndef WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
+#  endif
+#  include <winsock2.h>
 #else
 #  define SOCKET int
 #endif
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 43a0cc0..b792775 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -270,7 +270,7 @@ shutdown(how) -- shut down traffic in one or both directions\n\
 
 #  include <fcntl.h>
 
-#else
+#else /* MS_WINDOWS */
 
 /* MS_WINDOWS includes */
 # ifdef HAVE_FCNTL_H
@@ -281,7 +281,6 @@ shutdown(how) -- shut down traffic in one or both directions\n\
 # include <Rpc.h>
 
 /* Macros based on the IPPROTO enum, see: https://bugs.python.org/issue29515 */
-#ifdef MS_WINDOWS
 #define IPPROTO_ICMP IPPROTO_ICMP
 #define IPPROTO_IGMP IPPROTO_IGMP
 #define IPPROTO_GGP IPPROTO_GGP
@@ -312,7 +311,6 @@ shutdown(how) -- shut down traffic in one or both directions\n\
 #define IPPROTO_PGM IPPROTO_PGM  // WinSock2 only
 #define IPPROTO_L2TP IPPROTO_L2TP  // WinSock2 only
 #define IPPROTO_SCTP IPPROTO_SCTP  // WinSock2 only
-#endif /* MS_WINDOWS */
 
 /* Provides the IsWindows7SP1OrGreater() function */
 #include <versionhelpers.h>
@@ -348,13 +346,18 @@ remove_unusable_flags(PyObject *m)
 {
     PyObject *dict;
     OSVERSIONINFOEX info;
-    DWORDLONG dwlConditionMask;
 
     dict = PyModule_GetDict(m);
     if (dict == NULL) {
         return -1;
     }
-
+#ifndef MS_WINDOWS_DESKTOP
+    info.dwOSVersionInfoSize = sizeof(info);
+    if (!GetVersionExW((OSVERSIONINFOW*) &info)) {
+        PyErr_SetFromWindowsErr(0);
+        return -1;
+    }
+#else
     /* set to Windows 10, except BuildNumber. */
     memset(&info, 0, sizeof(info));
     info.dwOSVersionInfoSize = sizeof(info);
@@ -362,19 +365,30 @@ remove_unusable_flags(PyObject *m)
     info.dwMinorVersion = 0;
 
     /* set Condition Mask */
-    dwlConditionMask = 0;
+    DWORDLONG dwlConditionMask = 0;
     VER_SET_CONDITION(dwlConditionMask, VER_MAJORVERSION, VER_GREATER_EQUAL);
     VER_SET_CONDITION(dwlConditionMask, VER_MINORVERSION, VER_GREATER_EQUAL);
     VER_SET_CONDITION(dwlConditionMask, VER_BUILDNUMBER, VER_GREATER_EQUAL);
+#endif
 
     for (int i=0; i<sizeof(win_runtime_flags)/sizeof(FlagRuntimeInfo); i++) {
+#ifdef MS_WINDOWS_DESKTOP
         info.dwBuildNumber = win_runtime_flags[i].build_number;
         /* greater than or equal to the specified version?
            Compatibility Mode will not cheat VerifyVersionInfo(...) */
-        if (VerifyVersionInfo(
-                &info,
-                VER_MAJORVERSION|VER_MINORVERSION|VER_BUILDNUMBER,
-                dwlConditionMask)) {
+        BOOL isSupported = VerifyVersionInfo(
+            &info,
+            VER_MAJORVERSION|VER_MINORVERSION|VER_BUILDNUMBER,
+            dwlConditionMask);
+#else
+        /* note in this case 'info' is the actual OS version, whereas above
+           it is the version to compare against. */
+        BOOL isSupported = info.dwMajorVersion > 10 ||
+            (info.dwMajorVersion == 10 && info.dwMinorVersion > 0) ||
+            (info.dwMajorVersion == 10 && info.dwMinorVersion == 0 &&
+            info.dwBuildNumber >= win_runtime_flags[i].build_number);
+#endif
+        if (isSupported) {
             break;
         }
         else {
@@ -497,14 +511,14 @@ remove_unusable_flags(PyObject *m)
 #endif
 #endif
 
-#ifdef MS_WINDOWS
+#ifdef MS_WINDOWS_DESKTOP
 #define sockaddr_rc SOCKADDR_BTH_REDEF
 
 #define USE_BLUETOOTH 1
 #define AF_BLUETOOTH AF_BTH
 #define BTPROTO_RFCOMM BTHPROTO_RFCOMM
 #define _BT_RC_MEMB(sa, memb) ((sa)->memb)
-#endif
+#endif /* MS_WINDOWS_DESKTOP */
 
 /* Convert "sock_addr_t *" to "struct sockaddr *". */
 #define SAS2SA(x)       (&((x)->sa))
@@ -2869,11 +2883,16 @@ sock_accept(PySocketSockObject *s, PyObject *Py_UNUSED(ignored))
     newfd = ctx.result;
 
 #ifdef MS_WINDOWS
+#if defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
+#ifndef HANDLE_FLAG_INHERIT
+#define HANDLE_FLAG_INHERIT 0x00000001
+#endif
     if (!SetHandleInformation((HANDLE)newfd, HANDLE_FLAG_INHERIT, 0)) {
         PyErr_SetFromWindowsErr(0);
         SOCKETCLOSE(newfd);
         goto finally;
     }
+#endif
 #else
 
 #if defined(HAVE_ACCEPT4) && defined(SOCK_CLOEXEC)
@@ -5434,11 +5453,6 @@ sock_initobj_impl(PySocketSockObject *self, int family, int type, int proto,
             proto = 0;
         }
 #ifdef MS_WINDOWS
-        /* Windows implementation */
-#ifndef WSA_FLAG_NO_HANDLE_INHERIT
-#define WSA_FLAG_NO_HANDLE_INHERIT 0x80
-#endif
-
         Py_BEGIN_ALLOW_THREADS
         fd = WSASocketW(family, type, proto,
                         NULL, 0,
@@ -6150,8 +6164,9 @@ socket_dup(PyObject *self, PyObject *fdobj)
 #endif
 
     fd = PyLong_AsSocket_t(fdobj);
-    if (fd == (SOCKET_T)(-1) && PyErr_Occurred())
+    if (fd == (SOCKET_T)(-1) && PyErr_Occurred()) {
         return NULL;
+    }
 
 #ifdef MS_WINDOWS
     if (WSADuplicateSocketW(fd, GetCurrentProcessId(), &info))
@@ -6160,8 +6175,9 @@ socket_dup(PyObject *self, PyObject *fdobj)
     newfd = WSASocketW(FROM_PROTOCOL_INFO, FROM_PROTOCOL_INFO,
                       FROM_PROTOCOL_INFO,
                       &info, 0, WSA_FLAG_OVERLAPPED);
-    if (newfd == INVALID_SOCKET)
+    if (newfd == INVALID_SOCKET) {
         return set_error();
+    }
 
     if (!SetHandleInformation((HANDLE)newfd, HANDLE_FLAG_INHERIT, 0)) {
         closesocket(newfd);
@@ -6171,13 +6187,15 @@ socket_dup(PyObject *self, PyObject *fdobj)
 #else
     /* On UNIX, dup can be used to duplicate the file descriptor of a socket */
     newfd = _Py_dup(fd);
-    if (newfd == INVALID_SOCKET)
+    if (newfd == INVALID_SOCKET) {
         return NULL;
+    }
 #endif
 
     newfdobj = PyLong_FromSocket_t(newfd);
-    if (newfdobj == NULL)
+    if (newfdobj == NULL) {
         SOCKETCLOSE(newfd);
+    }
     return newfdobj;
 }
 
diff --git a/Modules/timemodule.c b/Modules/timemodule.c
index c2bacaa..c50e689 100644
--- a/Modules/timemodule.c
+++ b/Modules/timemodule.c
@@ -30,7 +30,9 @@
 #  include <i86.h>
 #else
 #  ifdef MS_WINDOWS
-#    define WIN32_LEAN_AND_MEAN
+#    ifndef WIN32_LEAN_AND_MEAN
+#      define WIN32_LEAN_AND_MEAN
+#    endif
 #    include <windows.h>
 #  endif /* MS_WINDOWS */
 #endif /* !__WATCOMC__ || __QNX__ */
@@ -1135,7 +1137,9 @@ time_tzset(PyObject *self, PyObject *unused)
         return NULL;
     }
 
+#if !defined(MS_WINDOWS) || defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
     tzset();
+#endif
 
     /* Reset timezone, altzone, daylight and tzname */
     if (init_timezone(m) < 0) {
@@ -1753,7 +1757,9 @@ init_timezone(PyObject *m)
      */
 #ifdef HAVE_DECL_TZNAME
     PyObject *otz0, *otz1;
+#if !defined(MS_WINDOWS) || defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
     tzset();
+#endif
     PyModule_AddIntConstant(m, "timezone", _Py_timezone);
 #ifdef HAVE_ALTZONE
     PyModule_AddIntConstant(m, "altzone", altzone);
diff --git a/Objects/obmalloc.c b/Objects/obmalloc.c
index 276c5a2..5e1bcda 100644
--- a/Objects/obmalloc.c
+++ b/Objects/obmalloc.c
@@ -8,7 +8,6 @@
 #include <stdlib.h>               // malloc()
 #include <stdbool.h>
 
-
 #undef  uint
 #define uint pymem_uint
 
diff --git a/PC/clinic/msvcrtmodule.c.h b/PC/clinic/msvcrtmodule.c.h
index d808ef0..b708c6c 100644
--- a/PC/clinic/msvcrtmodule.c.h
+++ b/PC/clinic/msvcrtmodule.c.h
@@ -261,6 +261,8 @@ msvcrt_getch(PyObject *module, PyObject *Py_UNUSED(ignored))
     return return_value;
 }
 
+#if defined(MS_WINDOWS_DESKTOP)
+
 PyDoc_STRVAR(msvcrt_getwch__doc__,
 "getwch($module, /)\n"
 "--\n"
@@ -285,6 +287,8 @@ msvcrt_getwch(PyObject *module, PyObject *Py_UNUSED(ignored))
     return return_value;
 }
 
+#endif /* defined(MS_WINDOWS_DESKTOP) */
+
 PyDoc_STRVAR(msvcrt_getche__doc__,
 "getche($module, /)\n"
 "--\n"
@@ -309,6 +313,8 @@ msvcrt_getche(PyObject *module, PyObject *Py_UNUSED(ignored))
     return return_value;
 }
 
+#if defined(MS_WINDOWS_DESKTOP)
+
 PyDoc_STRVAR(msvcrt_getwche__doc__,
 "getwche($module, /)\n"
 "--\n"
@@ -333,6 +339,8 @@ msvcrt_getwche(PyObject *module, PyObject *Py_UNUSED(ignored))
     return return_value;
 }
 
+#endif /* defined(MS_WINDOWS_DESKTOP) */
+
 PyDoc_STRVAR(msvcrt_putch__doc__,
 "putch($module, char, /)\n"
 "--\n"
@@ -367,6 +375,8 @@ exit:
     return return_value;
 }
 
+#if defined(MS_WINDOWS_DESKTOP)
+
 PyDoc_STRVAR(msvcrt_putwch__doc__,
 "putwch($module, unicode_char, /)\n"
 "--\n"
@@ -403,6 +413,8 @@ exit:
     return return_value;
 }
 
+#endif /* defined(MS_WINDOWS_DESKTOP) */
+
 PyDoc_STRVAR(msvcrt_ungetch__doc__,
 "ungetch($module, char, /)\n"
 "--\n"
@@ -441,6 +453,8 @@ exit:
     return return_value;
 }
 
+#if defined(MS_WINDOWS_DESKTOP)
+
 PyDoc_STRVAR(msvcrt_ungetwch__doc__,
 "ungetwch($module, unicode_char, /)\n"
 "--\n"
@@ -477,6 +491,8 @@ exit:
     return return_value;
 }
 
+#endif /* defined(MS_WINDOWS_DESKTOP) */
+
 #if defined(_DEBUG)
 
 PyDoc_STRVAR(msvcrt_CrtSetReportFile__doc__,
@@ -610,6 +626,8 @@ exit:
 
 #endif /* defined(_DEBUG) */
 
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM))
+
 PyDoc_STRVAR(msvcrt_GetErrorMode__doc__,
 "GetErrorMode($module, /)\n"
 "--\n"
@@ -628,6 +646,8 @@ msvcrt_GetErrorMode(PyObject *module, PyObject *Py_UNUSED(ignored))
     return msvcrt_GetErrorMode_impl(module);
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)) */
+
 PyDoc_STRVAR(msvcrt_SetErrorMode__doc__,
 "SetErrorMode($module, mode, /)\n"
 "--\n"
@@ -656,6 +676,22 @@ exit:
     return return_value;
 }
 
+#ifndef MSVCRT_GETWCH_METHODDEF
+    #define MSVCRT_GETWCH_METHODDEF
+#endif /* !defined(MSVCRT_GETWCH_METHODDEF) */
+
+#ifndef MSVCRT_GETWCHE_METHODDEF
+    #define MSVCRT_GETWCHE_METHODDEF
+#endif /* !defined(MSVCRT_GETWCHE_METHODDEF) */
+
+#ifndef MSVCRT_PUTWCH_METHODDEF
+    #define MSVCRT_PUTWCH_METHODDEF
+#endif /* !defined(MSVCRT_PUTWCH_METHODDEF) */
+
+#ifndef MSVCRT_UNGETWCH_METHODDEF
+    #define MSVCRT_UNGETWCH_METHODDEF
+#endif /* !defined(MSVCRT_UNGETWCH_METHODDEF) */
+
 #ifndef MSVCRT_CRTSETREPORTFILE_METHODDEF
     #define MSVCRT_CRTSETREPORTFILE_METHODDEF
 #endif /* !defined(MSVCRT_CRTSETREPORTFILE_METHODDEF) */
@@ -667,4 +703,8 @@ exit:
 #ifndef MSVCRT_SET_ERROR_MODE_METHODDEF
     #define MSVCRT_SET_ERROR_MODE_METHODDEF
 #endif /* !defined(MSVCRT_SET_ERROR_MODE_METHODDEF) */
-/*[clinic end generated code: output=204bae9fee7f6124 input=a9049054013a1b77]*/
+
+#ifndef MSVCRT_GETERRORMODE_METHODDEF
+    #define MSVCRT_GETERRORMODE_METHODDEF
+#endif /* !defined(MSVCRT_GETERRORMODE_METHODDEF) */
+/*[clinic end generated code: output=2db6197608a6aab3 input=a9049054013a1b77]*/
diff --git a/PC/clinic/winreg.c.h b/PC/clinic/winreg.c.h
index 2834d99..7a94743 100644
--- a/PC/clinic/winreg.c.h
+++ b/PC/clinic/winreg.c.h
@@ -8,6 +8,8 @@ preserve
 #endif
 
 
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_HKEYType_Close__doc__,
 "Close($self, /)\n"
 "--\n"
@@ -28,6 +30,10 @@ winreg_HKEYType_Close(PyHKEYObject *self, PyObject *Py_UNUSED(ignored))
     return winreg_HKEYType_Close_impl(self);
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_HKEYType_Detach__doc__,
 "Detach($self, /)\n"
 "--\n"
@@ -54,6 +60,10 @@ winreg_HKEYType_Detach(PyHKEYObject *self, PyObject *Py_UNUSED(ignored))
     return winreg_HKEYType_Detach_impl(self);
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_HKEYType___enter____doc__,
 "__enter__($self, /)\n"
 "--\n"
@@ -77,6 +87,10 @@ winreg_HKEYType___enter__(PyHKEYObject *self, PyObject *Py_UNUSED(ignored))
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_HKEYType___exit____doc__,
 "__exit__($self, /, exc_type, exc_value, traceback)\n"
 "--\n"
@@ -136,6 +150,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_CloseKey__doc__,
 "CloseKey($module, hkey, /)\n"
 "--\n"
@@ -151,6 +169,10 @@ PyDoc_STRVAR(winreg_CloseKey__doc__,
 #define WINREG_CLOSEKEY_METHODDEF    \
     {"CloseKey", (PyCFunction)winreg_CloseKey, METH_O, winreg_CloseKey__doc__},
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM))
+
 PyDoc_STRVAR(winreg_ConnectRegistry__doc__,
 "ConnectRegistry($module, computer_name, key, /)\n"
 "--\n"
@@ -213,6 +235,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_CreateKey__doc__,
 "CreateKey($module, key, sub_key, /)\n"
 "--\n"
@@ -278,6 +304,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_CreateKeyEx__doc__,
 "CreateKeyEx($module, /, key, sub_key, reserved=0,\n"
 "            access=winreg.KEY_WRITE)\n"
@@ -398,6 +428,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_DeleteKey__doc__,
 "DeleteKey($module, key, sub_key, /)\n"
 "--\n"
@@ -452,6 +486,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_DeleteKeyEx__doc__,
 "DeleteKeyEx($module, /, key, sub_key, access=winreg.KEY_WOW64_64KEY,\n"
 "            reserved=0)\n"
@@ -565,6 +603,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_DeleteValue__doc__,
 "DeleteValue($module, key, value, /)\n"
 "--\n"
@@ -617,6 +659,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_EnumKey__doc__,
 "EnumKey($module, key, index, /)\n"
 "--\n"
@@ -661,6 +707,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_EnumValue__doc__,
 "EnumValue($module, key, index, /)\n"
 "--\n"
@@ -714,6 +764,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_ExpandEnvironmentStrings__doc__,
 "ExpandEnvironmentStrings($module, string, /)\n"
 "--\n"
@@ -750,6 +804,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM))
+
 PyDoc_STRVAR(winreg_FlushKey__doc__,
 "FlushKey($module, key, /)\n"
 "--\n"
@@ -790,6 +848,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM))
+
 PyDoc_STRVAR(winreg_LoadKey__doc__,
 "LoadKey($module, key, sub_key, file_name, /)\n"
 "--\n"
@@ -866,6 +928,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_OpenKey__doc__,
 "OpenKey($module, /, key, sub_key, reserved=0, access=winreg.KEY_READ)\n"
 "--\n"
@@ -979,6 +1045,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_OpenKeyEx__doc__,
 "OpenKeyEx($module, /, key, sub_key, reserved=0, access=winreg.KEY_READ)\n"
 "--\n"
@@ -1092,6 +1162,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_QueryInfoKey__doc__,
 "QueryInfoKey($module, key, /)\n"
 "--\n"
@@ -1128,6 +1202,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_QueryValue__doc__,
 "QueryValue($module, key, sub_key, /)\n"
 "--\n"
@@ -1189,6 +1267,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_QueryValueEx__doc__,
 "QueryValueEx($module, key, name, /)\n"
 "--\n"
@@ -1246,6 +1328,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM))
+
 PyDoc_STRVAR(winreg_SaveKey__doc__,
 "SaveKey($module, key, file_name, /)\n"
 "--\n"
@@ -1303,6 +1389,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_SetValue__doc__,
 "SetValue($module, key, sub_key, type, value, /)\n"
 "--\n"
@@ -1384,6 +1474,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES))
+
 PyDoc_STRVAR(winreg_SetValueEx__doc__,
 "SetValueEx($module, key, value_name, reserved, type, value, /)\n"
 "--\n"
@@ -1478,6 +1572,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM))
+
 PyDoc_STRVAR(winreg_DisableReflectionKey__doc__,
 "DisableReflectionKey($module, key, /)\n"
 "--\n"
@@ -1514,6 +1612,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM))
+
 PyDoc_STRVAR(winreg_EnableReflectionKey__doc__,
 "EnableReflectionKey($module, key, /)\n"
 "--\n"
@@ -1548,6 +1650,10 @@ exit:
     return return_value;
 }
 
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)) */
+
+#if (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM))
+
 PyDoc_STRVAR(winreg_QueryReflectionKey__doc__,
 "QueryReflectionKey($module, key, /)\n"
 "--\n"
@@ -1579,4 +1685,114 @@ winreg_QueryReflectionKey(PyObject *module, PyObject *arg)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=7e817dc5edc914d3 input=a9049054013a1b77]*/
+
+#endif /* (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)) && (defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)) */
+
+#ifndef WINREG_HKEYTYPE_CLOSE_METHODDEF
+    #define WINREG_HKEYTYPE_CLOSE_METHODDEF
+#endif /* !defined(WINREG_HKEYTYPE_CLOSE_METHODDEF) */
+
+#ifndef WINREG_HKEYTYPE_DETACH_METHODDEF
+    #define WINREG_HKEYTYPE_DETACH_METHODDEF
+#endif /* !defined(WINREG_HKEYTYPE_DETACH_METHODDEF) */
+
+#ifndef WINREG_HKEYTYPE___ENTER___METHODDEF
+    #define WINREG_HKEYTYPE___ENTER___METHODDEF
+#endif /* !defined(WINREG_HKEYTYPE___ENTER___METHODDEF) */
+
+#ifndef WINREG_HKEYTYPE___EXIT___METHODDEF
+    #define WINREG_HKEYTYPE___EXIT___METHODDEF
+#endif /* !defined(WINREG_HKEYTYPE___EXIT___METHODDEF) */
+
+#ifndef WINREG_CLOSEKEY_METHODDEF
+    #define WINREG_CLOSEKEY_METHODDEF
+#endif /* !defined(WINREG_CLOSEKEY_METHODDEF) */
+
+#ifndef WINREG_CONNECTREGISTRY_METHODDEF
+    #define WINREG_CONNECTREGISTRY_METHODDEF
+#endif /* !defined(WINREG_CONNECTREGISTRY_METHODDEF) */
+
+#ifndef WINREG_CREATEKEY_METHODDEF
+    #define WINREG_CREATEKEY_METHODDEF
+#endif /* !defined(WINREG_CREATEKEY_METHODDEF) */
+
+#ifndef WINREG_CREATEKEYEX_METHODDEF
+    #define WINREG_CREATEKEYEX_METHODDEF
+#endif /* !defined(WINREG_CREATEKEYEX_METHODDEF) */
+
+#ifndef WINREG_DELETEKEY_METHODDEF
+    #define WINREG_DELETEKEY_METHODDEF
+#endif /* !defined(WINREG_DELETEKEY_METHODDEF) */
+
+#ifndef WINREG_DELETEKEYEX_METHODDEF
+    #define WINREG_DELETEKEYEX_METHODDEF
+#endif /* !defined(WINREG_DELETEKEYEX_METHODDEF) */
+
+#ifndef WINREG_DELETEVALUE_METHODDEF
+    #define WINREG_DELETEVALUE_METHODDEF
+#endif /* !defined(WINREG_DELETEVALUE_METHODDEF) */
+
+#ifndef WINREG_ENUMKEY_METHODDEF
+    #define WINREG_ENUMKEY_METHODDEF
+#endif /* !defined(WINREG_ENUMKEY_METHODDEF) */
+
+#ifndef WINREG_ENUMVALUE_METHODDEF
+    #define WINREG_ENUMVALUE_METHODDEF
+#endif /* !defined(WINREG_ENUMVALUE_METHODDEF) */
+
+#ifndef WINREG_EXPANDENVIRONMENTSTRINGS_METHODDEF
+    #define WINREG_EXPANDENVIRONMENTSTRINGS_METHODDEF
+#endif /* !defined(WINREG_EXPANDENVIRONMENTSTRINGS_METHODDEF) */
+
+#ifndef WINREG_FLUSHKEY_METHODDEF
+    #define WINREG_FLUSHKEY_METHODDEF
+#endif /* !defined(WINREG_FLUSHKEY_METHODDEF) */
+
+#ifndef WINREG_LOADKEY_METHODDEF
+    #define WINREG_LOADKEY_METHODDEF
+#endif /* !defined(WINREG_LOADKEY_METHODDEF) */
+
+#ifndef WINREG_OPENKEY_METHODDEF
+    #define WINREG_OPENKEY_METHODDEF
+#endif /* !defined(WINREG_OPENKEY_METHODDEF) */
+
+#ifndef WINREG_OPENKEYEX_METHODDEF
+    #define WINREG_OPENKEYEX_METHODDEF
+#endif /* !defined(WINREG_OPENKEYEX_METHODDEF) */
+
+#ifndef WINREG_QUERYINFOKEY_METHODDEF
+    #define WINREG_QUERYINFOKEY_METHODDEF
+#endif /* !defined(WINREG_QUERYINFOKEY_METHODDEF) */
+
+#ifndef WINREG_QUERYVALUE_METHODDEF
+    #define WINREG_QUERYVALUE_METHODDEF
+#endif /* !defined(WINREG_QUERYVALUE_METHODDEF) */
+
+#ifndef WINREG_QUERYVALUEEX_METHODDEF
+    #define WINREG_QUERYVALUEEX_METHODDEF
+#endif /* !defined(WINREG_QUERYVALUEEX_METHODDEF) */
+
+#ifndef WINREG_SAVEKEY_METHODDEF
+    #define WINREG_SAVEKEY_METHODDEF
+#endif /* !defined(WINREG_SAVEKEY_METHODDEF) */
+
+#ifndef WINREG_SETVALUE_METHODDEF
+    #define WINREG_SETVALUE_METHODDEF
+#endif /* !defined(WINREG_SETVALUE_METHODDEF) */
+
+#ifndef WINREG_SETVALUEEX_METHODDEF
+    #define WINREG_SETVALUEEX_METHODDEF
+#endif /* !defined(WINREG_SETVALUEEX_METHODDEF) */
+
+#ifndef WINREG_DISABLEREFLECTIONKEY_METHODDEF
+    #define WINREG_DISABLEREFLECTIONKEY_METHODDEF
+#endif /* !defined(WINREG_DISABLEREFLECTIONKEY_METHODDEF) */
+
+#ifndef WINREG_ENABLEREFLECTIONKEY_METHODDEF
+    #define WINREG_ENABLEREFLECTIONKEY_METHODDEF
+#endif /* !defined(WINREG_ENABLEREFLECTIONKEY_METHODDEF) */
+
+#ifndef WINREG_QUERYREFLECTIONKEY_METHODDEF
+    #define WINREG_QUERYREFLECTIONKEY_METHODDEF
+#endif /* !defined(WINREG_QUERYREFLECTIONKEY_METHODDEF) */
+/*[clinic end generated code: output=715db416dc1321ee input=a9049054013a1b77]*/
diff --git a/PC/config.c b/PC/config.c
index b1481d7..9d0fe6f 100644
--- a/PC/config.c
+++ b/PC/config.c
@@ -43,10 +43,14 @@ extern PyObject* PyInit__collections(void);
 extern PyObject* PyInit__heapq(void);
 extern PyObject* PyInit__bisect(void);
 extern PyObject* PyInit__symtable(void);
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_GAMES)
 extern PyObject* PyInit_mmap(void);
+#endif
 extern PyObject* PyInit__csv(void);
 extern PyObject* PyInit__sre(void);
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)
 extern PyObject* PyInit_winreg(void);
+#endif
 extern PyObject* PyInit__struct(void);
 extern PyObject* PyInit__datetime(void);
 extern PyObject* PyInit__functools(void);
@@ -122,10 +126,14 @@ struct _inittab _PyImport_Inittab[] = {
     {"itertools", PyInit_itertools},
     {"_collections", PyInit__collections},
     {"_symtable", PyInit__symtable},
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_GAMES)
     {"mmap", PyInit_mmap},
+#endif
     {"_csv", PyInit__csv},
     {"_sre", PyInit__sre},
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)
     {"winreg", PyInit_winreg},
+#endif
     {"_struct", PyInit__struct},
     {"_datetime", PyInit__datetime},
     {"_functools", PyInit__functools},
diff --git a/PC/config_minimal.c b/PC/config_minimal.c
index 928a4ef..9a66ea1 100644
--- a/PC/config_minimal.c
+++ b/PC/config_minimal.c
@@ -5,8 +5,10 @@
 
 #include "Python.h"
 
+#ifdef Py_ENABLE_SHARED
 /* Define extern variables omitted from minimal builds */
 void *PyWin_DLLhModule = NULL;
+#endif
 
 
 extern PyObject* PyInit_faulthandler(void);
@@ -14,7 +16,9 @@ extern PyObject* PyInit__tracemalloc(void);
 extern PyObject* PyInit_gc(void);
 extern PyObject* PyInit_nt(void);
 extern PyObject* PyInit__signal(void);
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)
 extern PyObject* PyInit_winreg(void);
+#endif
 
 extern PyObject* PyInit__ast(void);
 extern PyObject* PyInit__io(void);
@@ -35,7 +39,9 @@ struct _inittab _PyImport_Inittab[] = {
     {"_tokenize", PyInit__tokenize},
     {"_tracemalloc", PyInit__tracemalloc},
 
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)
     {"winreg", PyInit_winreg},
+#endif
 
     /* This module "lives in" with marshal.c */
     {"marshal", PyMarshal_Init},
diff --git a/PC/msvcrtmodule.c b/PC/msvcrtmodule.c
index 988d9c9..face4d0 100644
--- a/PC/msvcrtmodule.c
+++ b/PC/msvcrtmodule.c
@@ -253,6 +253,8 @@ msvcrt_getch_impl(PyObject *module)
     return ch;
 }
 
+#ifdef MS_WINDOWS_DESKTOP
+
 /*[clinic input]
 msvcrt.getwch -> wchar_t
 
@@ -271,6 +273,8 @@ msvcrt_getwch_impl(PyObject *module)
     return ch;
 }
 
+#endif /* MS_WINDOWS_DESKTOP */
+
 /*[clinic input]
 msvcrt.getche -> byte_char
 
@@ -289,6 +293,8 @@ msvcrt_getche_impl(PyObject *module)
     return ch;
 }
 
+#ifdef MS_WINDOWS_DESKTOP
+
 /*[clinic input]
 msvcrt.getwche -> wchar_t
 
@@ -307,6 +313,8 @@ msvcrt_getwche_impl(PyObject *module)
     return ch;
 }
 
+#endif /* MS_WINDOWS_DESKTOP */
+
 /*[clinic input]
 msvcrt.putch
 
@@ -326,6 +334,8 @@ msvcrt_putch_impl(PyObject *module, char char_value)
     Py_RETURN_NONE;
 }
 
+#ifdef MS_WINDOWS_DESKTOP
+
 /*[clinic input]
 msvcrt.putwch
 
@@ -346,6 +356,8 @@ msvcrt_putwch_impl(PyObject *module, int unicode_char)
 
 }
 
+#endif /* MS_WINDOWS_DESKTOP */
+
 /*[clinic input]
 msvcrt.ungetch
 
@@ -374,6 +386,8 @@ msvcrt_ungetch_impl(PyObject *module, char char_value)
     Py_RETURN_NONE;
 }
 
+#ifdef MS_WINDOWS_DESKTOP
+
 /*[clinic input]
 msvcrt.ungetwch
 
@@ -398,6 +412,8 @@ msvcrt_ungetwch_impl(PyObject *module, int unicode_char)
     Py_RETURN_NONE;
 }
 
+#endif /* MS_WINDOWS_DESKTOP */
+
 #ifdef _DEBUG
 /*[clinic input]
 msvcrt.CrtSetReportFile -> HANDLE
@@ -475,6 +491,8 @@ msvcrt_set_error_mode_impl(PyObject *module, int mode)
 }
 #endif /* _DEBUG */
 
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)
+
 /*[clinic input]
 msvcrt.GetErrorMode
 
@@ -494,6 +512,8 @@ msvcrt_GetErrorMode_impl(PyObject *module)
     return PyLong_FromUnsignedLong(res);
 }
 
+#endif /* MS_WINDOWS_APP || MS_WINDOWS_SYSTEM */
+
 /*[clinic input]
 msvcrt.SetErrorMode
 
@@ -601,10 +621,12 @@ PyInit_msvcrt(void)
     insertint(d, "LK_NBRLCK", _LK_NBRLCK);
     insertint(d, "LK_RLCK", _LK_RLCK);
     insertint(d, "LK_UNLCK", _LK_UNLCK);
+#ifdef MS_WINDOWS_DESKTOP
     insertint(d, "SEM_FAILCRITICALERRORS", SEM_FAILCRITICALERRORS);
     insertint(d, "SEM_NOALIGNMENTFAULTEXCEPT", SEM_NOALIGNMENTFAULTEXCEPT);
     insertint(d, "SEM_NOGPFAULTERRORBOX", SEM_NOGPFAULTERRORBOX);
     insertint(d, "SEM_NOOPENFILEERRORBOX", SEM_NOOPENFILEERRORBOX);
+#endif
 #ifdef _DEBUG
     insertint(d, "CRT_WARN", _CRT_WARN);
     insertint(d, "CRT_ERROR", _CRT_ERROR);
diff --git a/PC/pyconfig.h b/PC/pyconfig.h
index a34d420..8a3bf89 100644
--- a/PC/pyconfig.h
+++ b/PC/pyconfig.h
@@ -72,9 +72,27 @@ WIN32 is still required for the locale module.
 #define USE_SOCKET
 #endif
 
-#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY != WINAPI_FAMILY_DESKTOP_APP)
-#define MS_WINDOWS_NON_DESKTOP
+#if defined(Py_BUILD_CORE) || defined(Py_BUILD_CORE_BUILTIN) || defined(Py_BUILD_CORE_MODULE)
+#include <winapifamily.h>
+
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#define MS_WINDOWS_DESKTOP
+#endif
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+#define MS_WINDOWS_APP
+#endif
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM)
+#define MS_WINDOWS_SYSTEM
 #endif
+#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_GAMES)
+#define MS_WINDOWS_GAMES
+#endif
+
+/* Define to 1 if you support windows console io */
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)
+#define HAVE_WINDOWS_CONSOLE_IO 1
+#endif
+#endif /* Py_BUILD_CORE || Py_BUILD_CORE_BUILTIN || Py_BUILD_CORE_MODULE */
 
 /* Compiler specific defines */
 
@@ -300,7 +318,7 @@ Py_NO_ENABLE_SHARED to find out.  Also support MS_NO_COREDLL for b/w compat */
 #       endif /* Py_BUILD_CORE */
 #endif /* MS_COREDLL */
 
-#if defined(MS_WIN64)
+#ifdef MS_WIN64
 /* maintain "win32" sys.platform for backward compatibility of Python code,
    the Win64 API should be close enough to the Win32 API to make this
    preferable */
diff --git a/PC/winreg.c b/PC/winreg.c
index 86efed0..073598a 100644
--- a/PC/winreg.c
+++ b/PC/winreg.c
@@ -18,6 +18,8 @@
 #include "structmember.h"         // PyMemberDef
 #include <windows.h>
 
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM) || defined(MS_WINDOWS_GAMES)
+
 static BOOL PyHKEY_AsHKEY(PyObject *ob, HKEY *pRes, BOOL bNoneOK);
 static BOOL clinic_HKEY_converter(PyObject *ob, void *p);
 static PyObject *PyHKEY_FromHKEY(HKEY h);
@@ -829,6 +831,8 @@ winreg_CloseKey(PyObject *module, PyObject *hkey)
     Py_RETURN_NONE;
 }
 
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
+
 /*[clinic input]
 winreg.ConnectRegistry -> HKEY
 
@@ -866,6 +870,8 @@ winreg_ConnectRegistry_impl(PyObject *module,
     return retKey;
 }
 
+#endif /* MS_WINDOWS_DESKTOP || MS_WINDOWS_SYSTEM */
+
 /*[clinic input]
 winreg.CreateKey -> HKEY
 
@@ -1272,6 +1278,8 @@ winreg_ExpandEnvironmentStrings_impl(PyObject *module,
     return o;
 }
 
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
+
 /*[clinic input]
 winreg.FlushKey
 
@@ -1305,6 +1313,9 @@ winreg_FlushKey_impl(PyObject *module, HKEY key)
     Py_RETURN_NONE;
 }
 
+#endif /* MS_WINDOWS_DESKTOP || MS_WINDOWS_SYSTEM */
+
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
 
 /*[clinic input]
 winreg.LoadKey
@@ -1354,6 +1365,8 @@ winreg_LoadKey_impl(PyObject *module, HKEY key, const Py_UNICODE *sub_key,
     Py_RETURN_NONE;
 }
 
+#endif /* MS_WINDOWS_DESKTOP || MS_WINDOWS_SYSTEM */
+
 /*[clinic input]
 winreg.OpenKey -> HKEY
 
@@ -1463,6 +1476,7 @@ winreg_QueryInfoKey_impl(PyObject *module, HKEY key)
     return ret;
 }
 
+
 /*[clinic input]
 winreg.QueryValue
 
@@ -1634,6 +1648,8 @@ winreg_QueryValueEx_impl(PyObject *module, HKEY key, const Py_UNICODE *name)
     return result;
 }
 
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
+
 /*[clinic input]
 winreg.SaveKey
 
@@ -1679,6 +1695,8 @@ winreg_SaveKey_impl(PyObject *module, HKEY key, const Py_UNICODE *file_name)
     Py_RETURN_NONE;
 }
 
+#endif /* MS_WINDOWS_DESKTOP || MS_WINDOWS_SYSTEM */
+
 /*[clinic input]
 winreg.SetValue
 
@@ -1776,6 +1794,7 @@ exit:
     return result;
 }
 
+
 /*[clinic input]
 winreg.SetValueEx
 
@@ -1861,6 +1880,8 @@ exit:
     return result;
 }
 
+#if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
+
 /*[clinic input]
 winreg.DisableReflectionKey
 
@@ -2009,6 +2030,8 @@ winreg_QueryReflectionKey_impl(PyObject *module, HKEY key)
     return PyBool_FromLong(result);
 }
 
+#endif /* MS_WINDOWS_DESKTOP || MS_WINDOWS_SYSTEM */
+
 static struct PyMethodDef winreg_methods[] = {
     WINREG_CLOSEKEY_METHODDEF
     WINREG_CONNECTREGISTRY_METHODDEF
@@ -2149,3 +2172,5 @@ PyMODINIT_FUNC PyInit_winreg(void)
     ADD_INT(REG_RESOURCE_REQUIREMENTS_LIST);
     return m;
 }
+
+#endif /* MS_WINDOWS_DESKTOP || MS_WINDOWS_SYSTEM || MS_WINDOWS_GAMES */
diff --git a/Parser/myreadline.c b/Parser/myreadline.c
index d55fcef..3f0e29f 100644
--- a/Parser/myreadline.c
+++ b/Parser/myreadline.c
@@ -13,7 +13,9 @@
 #include "pycore_fileutils.h"     // _Py_BEGIN_SUPPRESS_IPH
 #include "pycore_pystate.h"   // _PyThreadState_GET()
 #ifdef MS_WINDOWS
+#  ifndef WIN32_LEAN_AND_MEAN
 #  define WIN32_LEAN_AND_MEAN
+#  endif
 #  include "windows.h"
 #endif /* MS_WINDOWS */
 
@@ -108,7 +110,7 @@ my_fgets(PyThreadState* tstate, char *buf, int len, FILE *fp)
     /* NOTREACHED */
 }
 
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
 /* Readline implementation using ReadConsoleW */
 
 extern char _get_console_type(HANDLE handle);
@@ -233,7 +235,7 @@ exit:
     return buf;
 }
 
-#endif
+#endif /* HAVE_WINDOWS_CONSOLE_IO */
 
 
 /* Readline implementation using fgets() */
@@ -246,7 +248,7 @@ PyOS_StdioReadline(FILE *sys_stdin, FILE *sys_stdout, const char *prompt)
     PyThreadState *tstate = _PyOS_ReadlineTState;
     assert(tstate != NULL);
 
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
     const PyConfig *config = _PyInterpreterState_GetConfig(tstate->interp);
     if (!config->legacy_windows_stdio && sys_stdin == stdin) {
         HANDLE hStdIn, hStdErr;
diff --git a/Python/dynload_win.c b/Python/dynload_win.c
index 7bd04d5..acab05e 100644
--- a/Python/dynload_win.c
+++ b/Python/dynload_win.c
@@ -163,6 +163,7 @@ static char *GetPythonImport (HINSTANCE hModule)
     return NULL;
 }
 
+#ifdef Py_ENABLE_SHARED
 /* Load python3.dll before loading any extension module that might refer
    to it. That way, we can be sure that always the python3.dll corresponding
    to this python DLL is loaded, not a python3.dll that might be on the path
@@ -216,6 +217,7 @@ _Py_CheckPython3(void)
     return hPython3 != NULL;
     #undef MAXPATHLEN
 }
+#endif /* Py_ENABLE_SHARED */
 
 dl_funcptr _PyImport_FindSharedFuncptrWindows(const char *prefix,
                                               const char *shortname,
@@ -224,7 +226,9 @@ dl_funcptr _PyImport_FindSharedFuncptrWindows(const char *prefix,
     dl_funcptr p;
     char funcname[258], *import_python;
 
+#ifdef Py_ENABLE_SHARED
     _Py_CheckPython3();
+#endif /* Py_ENABLE_SHARED */
 
     wchar_t *wpathname = PyUnicode_AsWideCharString(pathname, NULL);
     if (wpathname == NULL)
@@ -234,10 +238,12 @@ dl_funcptr _PyImport_FindSharedFuncptrWindows(const char *prefix,
 
     {
         HINSTANCE hDLL = NULL;
+#ifdef MS_WINDOWS_DESKTOP
         unsigned int old_mode;
 
         /* Don't display a message box when Python can't load a DLL */
         old_mode = SetErrorMode(SEM_FAILCRITICALERRORS);
+#endif
 
         /* bpo-36085: We use LoadLibraryEx with restricted search paths
            to avoid DLL preloading attacks and enable use of the
@@ -250,8 +256,10 @@ dl_funcptr _PyImport_FindSharedFuncptrWindows(const char *prefix,
         Py_END_ALLOW_THREADS
         PyMem_Free(wpathname);
 
+#ifdef MS_WINDOWS_DESKTOP
         /* restore old error mode settings */
         SetErrorMode(old_mode);
+#endif
 
         if (hDLL==NULL){
             PyObject *message;
diff --git a/Python/fileutils.c b/Python/fileutils.c
index 93bee9e..4ac759c 100644
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -8,7 +8,11 @@
 #ifdef MS_WINDOWS
 #  include <malloc.h>
 #  include <windows.h>
-#  include <pathcch.h>            // PathCchCombineEx
+#  if defined(MS_WINDOWS_GAMES) && !defined(MS_WINDOWS_DESKTOP)
+#    define PATHCCH_ALLOW_LONG_PATHS 0x01
+#  else
+#    include <pathcch.h>            // PathCchCombineEx
+#  endif
 extern int winerror_to_errno(int);
 #endif
 
@@ -77,7 +81,8 @@ _Py_device_encoding(int fd)
     if (!valid)
         Py_RETURN_NONE;
 
-#if defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
     UINT cp;
     if (fd == 0)
         cp = GetConsoleCP();
@@ -93,6 +98,9 @@ _Py_device_encoding(int fd)
 
     return PyUnicode_FromFormat("cp%u", (unsigned int)cp);
 #else
+    Py_RETURN_NONE;
+#endif /* HAVE_WINDOWS_CONSOLE_IO */
+#else
     if (_PyRuntime.preconfig.utf8_mode) {
         _Py_DECLARE_STR(utf_8, "utf-8");
         return Py_NewRef(&_Py_STR(utf_8));
@@ -1270,6 +1278,13 @@ _Py_stat(PyObject *path, struct stat *statbuf)
 #endif
 }
 
+#ifdef MS_WINDOWS
+// For some Windows API partitions, SetHandleInformation() is declared
+// but none of the handle flags are defined.
+#ifndef HANDLE_FLAG_INHERIT
+#define HANDLE_FLAG_INHERIT 0x00000001
+#endif
+#endif
 
 /* This function MUST be kept async-signal-safe on POSIX when raise=0. */
 static int
@@ -2096,6 +2111,72 @@ _Py_abspath(const wchar_t *path, wchar_t **abspath_p)
 #endif
 }
 
+// The Windows Games API family implements the PathCch* APIs in the Xbox OS,
+// but does not expose them yet. Load them dynamically until
+// 1) they are officially exposed
+// 2) we stop supporting older versions of the GDK which do not expose them
+#if defined(MS_WINDOWS_GAMES) && !defined(MS_WINDOWS_DESKTOP)
+HRESULT
+PathCchSkipRoot(const wchar_t *path, const wchar_t **rootEnd)
+{
+    static int initialized = 0;
+    typedef HRESULT(__stdcall *PPathCchSkipRoot) (PCWSTR pszPath,
+                                                  PCWSTR *ppszRootEnd);
+    static PPathCchSkipRoot _PathCchSkipRoot;
+
+    if (initialized == 0) {
+        HMODULE pathapi = LoadLibraryExW(L"api-ms-win-core-path-l1-1-0.dll", NULL,
+                                         LOAD_LIBRARY_SEARCH_SYSTEM32);
+        if (pathapi) {
+            _PathCchSkipRoot = (PPathCchSkipRoot)GetProcAddress(
+                pathapi, "PathCchSkipRoot");
+        }
+        else {
+            _PathCchSkipRoot = NULL;
+        }
+        initialized = 1;
+    }
+
+    if (!_PathCchSkipRoot) {
+        return E_NOINTERFACE;
+    }
+
+    return _PathCchSkipRoot(path, rootEnd);
+}
+
+static HRESULT
+PathCchCombineEx(wchar_t *buffer, size_t bufsize, const wchar_t *dirname,
+                 const wchar_t *relfile, unsigned long flags)
+{
+    static int initialized = 0;
+    typedef HRESULT(__stdcall *PPathCchCombineEx) (PWSTR pszPathOut,
+                                                   size_t cchPathOut,
+                                                   PCWSTR pszPathIn,
+                                                   PCWSTR pszMore,
+                                                   unsigned long dwFlags);
+    static PPathCchCombineEx _PathCchCombineEx;
+
+    if (initialized == 0) {
+        HMODULE pathapi = LoadLibraryExW(L"api-ms-win-core-path-l1-1-0.dll", NULL,
+                                         LOAD_LIBRARY_SEARCH_SYSTEM32);
+        if (pathapi) {
+            _PathCchCombineEx = (PPathCchCombineEx)GetProcAddress(
+                pathapi, "PathCchCombineEx");
+        }
+        else {
+            _PathCchCombineEx = NULL;
+        }
+        initialized = 1;
+    }
+
+    if (!_PathCchCombineEx) {
+        return E_NOINTERFACE;
+    }
+
+    return _PathCchCombineEx(buffer, bufsize, dirname, relfile, flags);
+}
+
+#endif /* defined(MS_WINDOWS_GAMES) && !defined(MS_WINDOWS_DESKTOP) */
 
 // The caller must ensure "buffer" is big enough.
 static int
@@ -2491,12 +2572,12 @@ _Py_get_blocking(int fd)
     success = GetNamedPipeHandleStateW(handle, &mode,
                                        NULL, NULL, NULL, NULL, 0);
     Py_END_ALLOW_THREADS
-    
+
     if (!success) {
         PyErr_SetFromWindowsErr(0);
         return -1;
     }
-    
+
     return !(mode & PIPE_NOWAIT);
 }
 
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index e80dd30c..82e9409 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -2289,7 +2289,7 @@ create_stdio(const PyConfig *config, PyObject* io,
         raw = Py_NewRef(buf);
     }
 
-#ifdef MS_WINDOWS
+#ifdef HAVE_WINDOWS_CONSOLE_IO
     /* Windows console IO is always UTF-8 encoded */
     PyTypeObject *winconsoleio_type = (PyTypeObject *)_PyImport_GetModuleAttr(
             &_Py_ID(_io), &_Py_ID(_WindowsConsoleIO));
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 207abb9..764fb70 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -1490,6 +1490,9 @@ static PyStructSequence_Desc windows_version_desc = {
 static PyObject *
 _sys_getwindowsversion_from_kernel32()
 {
+#ifndef MS_WINDOWS_DESKTOP
+    return NULL;
+#else
     HANDLE hKernel32;
     wchar_t kernel32_path[MAX_PATH];
     LPVOID verblock;
@@ -1523,6 +1526,7 @@ _sys_getwindowsversion_from_kernel32()
     realBuild = HIWORD(ffi->dwProductVersionLS);
     PyMem_RawFree(verblock);
     return Py_BuildValue("(kkk)", realMajor, realMinor, realBuild);
+#endif /* !MS_WINDOWS_DESKTOP */
 }
 
 /* Disable deprecation warnings about GetVersionEx as the result is