ID: Q125014
1.30 1.30a 1.30c WINDOWS
kbhowto
This article describes how to obtain the version number information for Win32s installed on a Windows 3.1 machine from one of the following places:
Because Win32s does not have a user interface, there is no obvious way to get the version number information for Win32s that is installed on Windows 3.1. However, end users have the following two options:
Win32s Release versions and corresponding build numbers:
Win32s Release # Build #
---------------- -------
1.1 1.1.88
1.1a 1.1.89
1.15 1.15.103
1.15a 1.15.111
1.2 1.2.123
1.25 1.2.141
1.25a 1.2.142
1.30 1.2.159
1.30a 1.2.166
1.30c 1.2.172
Release # OLE32 OLE16
--------- ----- -----
1.2 2.02 2.02
1.25 2.03 2.03
1.25a 2.03a 2.03a
1.30 2.03b 2.03a
1.30a 2.03c 2.03b
1.30c 2.03d 2.03b
To get version number information for Win32s from a 16-bit application, use the Win32s specific function, GetWin32sInfo(), which is documented in the Win32s Programmer's Reference. This function is exported by the 16-bit W32SYS.DLL file in Win32s 1.1 and later. The GetWin32sInfo() function fills a specified structure with the information from Win32s VxD. Usually a 16- bit Windows setup program should use this function to determine if Win32s is already installed before continuing installation. Note that a 16-bit program must use LoadLibrary and GetProcAddress to call the function because the function did not exist in Win32s version 1.0.
The following example on using GetWin32sInfo() is extracted from the Win32s Programmer's Reference:
// Example of a 16-bit application that indicates whether Win32s is
// installed, and the version number if Win32s is loaded and VxD is
// functional.
//
// NOTE: There is no header file in the SDK which has a definition
// for the WIN32SINFO structure. Include the following structure
// definition into the source code.
BYTE bMajor;
BYTE bMinor;
WORD wBuildNumber;
BOOL fDebug;
BOOL FAR PASCAL IsWin32sLoaded(LPSTR szVersion) {
BOOL fWin32sLoaded = FALSE;
FARPROC pfnInfo;
HANDLE hWin32sys;
WIN32SINFO Info;
hWin32sys = LoadLibrary("W32SYS.DLL");
if (hWin32sys > HINSTANCE_ERROR) {
pfnInfo = GetProcAddress(hWin32sys, "GETWIN32SINFO");
if (pfnInfo) {
// Win32s version 1.1 is installed
if (!(*pfnInfo)((LPWIN32SINFO) &Info)) {
fWin32sLoaded = TRUE;
wsprintf(szVersion, "%d.%d.%d.0",
Info.bMajor, Info.bMinor, Info.wBuildNumber);
} else
fWin32sLoaded = FALSE; // Win32s VxD not loaded.
} else {
// Win32s version 1.0 is installed.
fWin32sLoaded = TRUE;
lstrcpy( szVersion, "1.0.0.0" );
}
FreeLibrary( hWin32sys );
} else // Win32s not installed.
fWin32sLoaded = FALSE;
return fWin32sLoaded;
To determine if Win32s is installed, use the function GetVersion(); to then get the version of Win32s use the function, GetVersionEx(). This function fills a specified structure with version information of Win32s on Windows 3.1. The following is an example illustrating the use of this function:
// Example of a 32-bit code that determines the operating system installed
// and the version number on all platforms: Windows NT, Windows 95, Win32s.
BOOL IsWin32sLoaded(char *szVersion) {
BOOL fWin32sLoaded = FALSE;
DWORD dwGetVer;
HMODULE hKernel32;
OSVERSIONINFO ver;
LPFNGETVERSIONEX lpfnGetVersionEx;
// First, check if Win32s is installed
dwGetVer = GetVersion();
if (!(dwGetVer & 0x80000000))
{
// Windows NT is loaded
// Note, GetVersion will also return version number on Windows NT
return;
}
else if (LOBYTE(LOWORD(dwVersion))< 4)
{
// Win32s is loaded
fWin32sLoaded = TRUE;
}
else {
// Windows 95 is loaded
// Note, GetVersion will also return version number on Windows 95
return;
}
// Now, let's find the version number of Win32s
hKernel32 = GetModuleHandle("Kernel32");
if (hKernel32)
{
lpfnGetVersionEx = (LPFNGETVERSIONEX)GetProcAddress(hKernel32,
if (lpfnGetVersionEx)
{
// Win32s version 1.15 or later is installed
ver.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if (!(*lpfnGetVersionEx)((LPOSVERSIONINFO) &ver))
DisplayError("GetVersionEx");
else
wsprintf(szVersion, "%d.%d.%d - %s", ver.dwMajorVersion,
ver.dwBuildNumber, PlatformName(ver.dwPlatformId));
}
else
{
// This failure could mean several things
// 1. On an NT system, it indicates NT version 3.1 because GetVersionEx()
// is only implemented on NT 3.5.
// 2. On Windows 3.1 system, it means either Win32s version 1.1 or 1.0 is
// installed. You can distinguish between 1.1 and 1.0 in two ways:
// a. Get version info from WIN32S16.DLL like File Manager on NT does.
// b. Thunk to 16-bit side and call GetWin32sInfo.
}
}
return (fWin32sLoaded);
NOTE: In general, 32-bit applications that use Win32s should always ship with the latest version of Win32s. Therefore the detection code above can be greatly simplified if determination of previous versions of Win32s is not needed.
KBCategory: kbhowto KBSubcategory: W32s Additional reference words: 1.30 1.30a 1.30c win32s w32s win32 wfw
Keywords : kbenv kbWin32s
Version : 1.30 1.30a 1.30c
Platform : WINDOWSLast Reviewed: May 14, 1998