Microsoft KB Archive/66246

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SAMPLE: Twins.exe Uses RegisterWindowMessage for Interapp Comm.

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Q66246

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The information in this article applies to:


 * Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1

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SUMMARY
The RegisterWindowMessage function associates a unique message number with a given message name. This message number is guaranteed to be unique throughout the system but may change between Windows sessions. The new message is typically used for communication between two cooperating applications.

Using RegisterWindowMessage is an alternative to using DDE to communicate between two or more applications. This technique is most useful if the information to be passed between applications can be contained in the wParam and/or lParam parameter of the message.

A sample application is available that demonstrates how to implement communication between two cooperating applications, using RegisterWindowMessage.

MORE INFORMATION
The following file is available for download from the Microsoft Download Center:

"Twins.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.

Additional query words:

Keywords : kbfile kbsample kb16bitonly kbGrpDSUser kbOSWin310 kbWndw kbWndwMsg

Issue type :

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310