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-rw-r--r--win/tclWinPort.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/win/tclWinPort.h b/win/tclWinPort.h
index ee29a1a..d1b8227 100644
--- a/win/tclWinPort.h
+++ b/win/tclWinPort.h
@@ -19,6 +19,12 @@
# define _USE_32BIT_TIME_T
#endif
+/* Compatibility to older visual studio / windows platform SDK */
+#if !defined(MAXULONG_PTR)
+typedef DWORD DWORD_PTR;
+typedef DWORD_PTR * PDWORD_PTR;
+#endif
+
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN