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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 2eb261d..06d7dc6 100644
--- a/win/tclWinPort.h
+++ b/win/tclWinPort.h
@@ -18,6 +18,12 @@
# include "tclInt.h"
#endif
+/* Compatibility to older visual studio / windows platform SDK */
+#if !defined(MAXULONG_PTR)
+typedef DWORD DWORD_PTR;
+typedef DWORD_PTR * PDWORD_PTR;
+#endif
+
#ifdef CHECK_UNICODE_CALLS
# define _UNICODE
# define UNICODE