Added a couple of defines.

diff --git a/include/winbase.h b/include/winbase.h
index df82d19..e278500 100644
--- a/include/winbase.h
+++ b/include/winbase.h
@@ -749,6 +749,7 @@
 #define FILE_MAP_WRITE                  0x00000002
 #define FILE_MAP_READ                   0x00000004
 #define FILE_MAP_ALL_ACCESS             0x000f001f
+#define FILE_MAP_EXECUTE                0x00000020
 
 #define MOVEFILE_REPLACE_EXISTING       0x00000001
 #define MOVEFILE_COPY_ALLOWED           0x00000002