-#if ((defined(__WATCOMC__) && __WATCOMC__ >= 1200) || defined(__GNUWIN32__) || defined (__MINGW32__) || defined(__DIGITALMARS__) || defined (__BORLANDC__)) && !defined(HDN_GETDISPINFOW)
-#define HDN_GETDISPINFOW (HDN_FIRST-29)
-#if !wxCHECK_W32API_VERSION(2, 2)
-typedef struct {
- NMHDR hdr;
- int iItem;
- UINT mask;
- LPWSTR pszText;
- int cchTextMax;
- int iImage;
- LPARAM lParam;
-} NMHDDISPINFOW, *LPNMHDDISPINFOW;
+/*
+ * The following are required for VC++ 5 when the PSDK is not available.
+ */
+
+#if defined __VISUALC__ && __VISUALC__ <= 1100
+
+#ifndef VER_NT_WORKSTATION
+
+typedef struct _OSVERSIONINFOEXA {
+ DWORD dwOSVersionInfoSize;
+ DWORD dwMajorVersion;
+ DWORD dwMinorVersion;
+ DWORD dwBuildNumber;
+ DWORD dwPlatformId;
+ CHAR szCSDVersion[128];
+ WORD wServicePackMajor;
+ WORD wServicePackMinor;
+ WORD wSuiteMask;
+ BYTE wProductType;
+ BYTE wReserved;
+} OSVERSIONINFOEXA, *POSVERSIONINFOEXA, *LPOSVERSIONINFOEXA;
+typedef struct _OSVERSIONINFOEXW {
+ DWORD dwOSVersionInfoSize;
+ DWORD dwMajorVersion;
+ DWORD dwMinorVersion;
+ DWORD dwBuildNumber;
+ DWORD dwPlatformId;
+ WCHAR szCSDVersion[128];
+ WORD wServicePackMajor;
+ WORD wServicePackMinor;
+ WORD wSuiteMask;
+ BYTE wProductType;
+ BYTE wReserved;
+} OSVERSIONINFOEXW, *POSVERSIONINFOEXW, *LPOSVERSIONINFOEXW;
+
+#ifdef UNICODE
+typedef OSVERSIONINFOW OSVERSIONINFO,*POSVERSIONINFO,*LPOSVERSIONINFO;
+typedef OSVERSIONINFOEXW OSVERSIONINFOEX,*POSVERSIONINFOEX,*LPOSVERSIONINFOEX;
+#else
+typedef OSVERSIONINFOA OSVERSIONINFO,*POSVERSIONINFO,*LPOSVERSIONINFO;
+typedef OSVERSIONINFOEXA OSVERSIONINFOEX,*POSVERSIONINFOEX,*LPOSVERSIONINFOEX;