Microsoft KB Archive/162511

= Calling CMSPTR over Thunking DLLs Causes Access Violation =

Article ID: 162511

Article Last Modified on 11/4/2003

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APPLIES TO


 * Microsoft SNA Server 3.0
 * Microsoft SNA Server 2.11 Service Pack 1

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This article was previously published under Q162511





SYMPTOMS
When a 16-bit CPI-C application calls uses the Set_Prepare_To_Receive_Type(cmsptr) application programming interface (API) while running over the 16-bit-to-32-bit CPIC thunking interface, the application terminates abnormally with an application error.



CAUSE
The CPIC thunking interface was not handling this call correctly. In the thunking code, The Set_Prepare_To_Receive_Type(cmsptr) function is defined as: CallProcEx32W(4,0xF,(DWORD)lpfn32, (DWORD)pConvID, (DWORD)pPTRType, (DWORD)pRetCode); The function should be: CallProcEx32W(3,0xF,(DWORD)lpfn32, (DWORD)pConvID, (DWORD)pPTRType, (DWORD)pRetCode);<



RESOLUTION
Apply the fix referenced below.



STATUS
Microsoft has confirmed this to be a problem in SNA Server 2.11, 2.11 Service Pack 1 (SP1). A supported fix is now available for 2.11 SP1, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

Keywords: kbbug kbfix kbnetwork KB162511

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