1 files changed, 20 insertions, 0 deletions
diff --git a/win/tclWinInit.c b/win/tclWinInit.c
index 8b600f6..03ef5df 100644
--- a/win/tclWinInit.c
+++ b/win/tclWinInit.c
@@ -76,6 +76,15 @@ typedef struct {
 #define PROCESSOR_ARCHITECTURE_UNKNOWN		0xFFFF
 #endif
 
+
+/*
+ * Windows version dependend functions
+ */
+static TclWinProcs _tclWinProcs = {
+    NULL
+};
+TclWinProcs *tclWinProcs = &_tclWinProcs;
+
 /*
  * The following arrays contain the human readable strings for the Windows
  * platform and processor values.
@@ -132,6 +141,7 @@ TclpInitPlatform(void)
 {
     WSADATA wsaData;
     WORD wVersionRequested = MAKEWORD(2, 2);
+    HINSTANCE hInstance;
 
     tclPlatform = TCL_PLATFORM_WINDOWS;
 
@@ -150,6 +160,16 @@ TclpInitPlatform(void)
 
     TclWinInit(GetModuleHandle(NULL));
 #endif
+
+    /*
+     * Fill available functions depending on windows version
+     */
+    hInstance = LoadLibraryW(L"kernel32");
+    if (hInstance != NULL) {
+	_tclWinProcs.cancelSynchronousIo = 
+	    (BOOL (WINAPI *)(HANDLE)) GetProcAddress(hInstance,
+	    "CancelSynchronousIo");
+    }
 }
 
 /*