Microsoft KB Archive/120359

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16-Bit App WNetGetCaps Call Return Value on Win32

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Q120359

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The information in this article applies to:


 * Microsoft Win32 Software Development Kit (SDK), versions 3.5, 3.51, 4.0

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SUMMARY
16-bit Windows-based applications often call WNetGetCaps to determine the capabilities of the installed network. When a Windows-based application running on Windows NT calls WNetGetCaps, the return value is 0x8004, which corresponds to WNNC_NET_Multinet | WNNC_SUBNET_WinWorkgroups.

However, the Windows NT Windows on Windows (WOW) layer and Windows 95 do not support the Windows for Workgroups Multinet (MNet) APIs, so a call to one of these APIs returns a failed Dynalink error.

The return value of WNetGetCaps may not seem technically correct for Windows for Workgroups. It was designed to be compatible with all existing 16-bit Windows-based applications.

If you need to determine whether a 16-bit Windows-based application is running on Windows NT or MS-DOS/Windows version 3.1, use GetWinFlags. GetWinFlags returns a WF_WINNT flag if the application is running under WOW on Windows NT.

GetWinFlags is an existing function that was modified in WOW to add the following flag:

  #define WF_WINNT         0x4000 Additional query words: 3.50 4.00

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Issue type :

Technology : kbWin32SDKSearch kbAudDeveloper kbSDKSearch kbWin32sSearch kbWin32SDK400 kbWin32SDK350 kbWin32SDK351