ODBC, MAPI, Video for Windows, NetDDE, & RAS/RPC Under Win32s

ID: Q147432


The information in this article applies to:
  • Microsoft Win32s versions 1.30, 1.30a, 1.30c

The following interfaces are not completely supported under Win32s. Any exceptions are noted.
  • RAS API and RPC.


  • Video for Windows API (note that the MCI interface is supported).


  • MAPI interface (Also, a Win32s client can not thunk down to 16-bit MAPI in Windows 3.x. You will have to write a 16-bit client that calls the 16-bit MAPI APIs, and then have the Win32s client thunk to this 16-bit client). For more information on why a Win32s client (a 32-bit thunk DLL) cannot thunk to the 16-bit MAPI DLL, please refer to the following Knowledge Base article:

    Q149710 Why Thunking to 16-bit MAPI Will Fail Under Win32s


  • NetDDE interface.


  • ODBC (Win32s supports only ODBC version 2.0 and 2.1. Later versions of ODBC were not completely tested on Win32s).


Additional query words: kbinf

Keywords : kbWin32s
Version : 1.30 1.30a 1.30c
Platform : WINDOWS
Issue type :


Last Reviewed: March 7, 1999
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