Microsoft KB Archive/105304

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INFO: SetErrorMode Is Inherited

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Q105304

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The information in this article applies to:


 * Microsoft Win32 Application Programming Interface (API), used with:
 * Microsoft Windows NT Server versions 3.1, 3.5, 3.51
 * Microsoft Windows NT Workstation versions 3.1, 3.5, 3.51
 * Microsoft Windows 95

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An application can use SetErrorMode to control whether the operating system handles serious errors or whether the application itself will handle the errors.

NOTE: The error mode will be inherited by any child process. However, the child process may not be prepared to handle the error return codes. As a result, the application may die during a critical error without the usual error message popups occurring.

This behavior is by design.

One solution is to call SetErrorMode before and after the call to CreateProcess in order to control the error mode that is passed to the child. Be aware that this process must be synchronized in a multithreaded application.

There is another solution available in Windows NT 3.5 and later. CreateProcess has a new flag CREATE_DEFAULT_ERROR_MODE that can be used to control the error mode of the child process.

SUMMARY
Additional query words: 3.10 3.50 4.00

Keywords :

Issue type : kbinfo

Technology : kbAudDeveloper kbWin32sSearch kbWin32API