Microsoft KB Archive/92433

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Handling Callbacks with C++ Member Functions

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Q92433

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The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK) 3.1

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SUMMARY
The CALLB application demonstrates how to handle callbacks with C++ member functions. It is a companion application for the technical article on the MSDN, &quot;Calling All Members: Member Functions as Callbacks.&quot;

MORE INFORMATION
The following files are available for download from the Microsoft Download Center:

Callb.exe

For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base:

"Q119591 How to Obtain Microsoft Support Files from Online Services" Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file.

Microsoft Windows version 3.1 has over 30 callback functions that applications can use to enumerate objects, hook into the hardware, and perform a variety of other activities. The article explains why normal member functions cannot be used as callback functions and gives several techniques for handling callbacks. The article and source code are targeted toward Microsoft C/C++ version 7.0, but the ideas presented apply to all C++ compilers, including those by Borland and Zortech.

CALLB contains eight makefiles that create six executables: MAKE1 creates CPROG1; MAKE2 generates a compile-time error and does not create an executable; MAKE3, MAKE4, MAKE5, and MAKE6 create CPROG3, CPROG4, CPROG5, and CPROG6, respectively; and TMAKE creates CTIMER. Please refer to &quot;Calling All Members: Member Functions as Callbacks&quot; for more information.

NOTE: Running CPROG1 generates a general protection (GP) fault by design.

CALLB was built and tested under Microsoft Windows version 3.1.

Additional query words: EnumObjects EnumObjectsProc softlib CALLB.EXE kbtoolkit kbfile

Keywords : kbfile kbsample kb16bitonly kbOSWin310

Issue type :

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310