Microsoft KB Archive/71836

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INFO: Menu Operations When MDI Child Maximized

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Q71836

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The information in this article applies to:


 * Microsoft Win32 Software Development Kit (SDK)
 * Microsoft Windows Software Development Kit (SDK) versions 3.0, 3.1

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SUMMARY
Pop-up menus added to an MDI application's menu using InsertMenu with MF_BYPOSITION will be inserted one position further left than expected if the active MDI child window is maximized. This behavior occurs because the system menu of the active MDI child is inserted into the first position of the MDI frame window's menu bar.

To avoid this problem, if the active child is maximized when a new pop-up is inserted by position, add 1 (one) to the position value that would otherwise have been used. To determine that the currently active child window is maximized, send a WM_MDIGETACTIVE message to the MDI client window. In 16-bit Windows, if the high word of the return value from this message contains 1, the active child window is maximized. In Win32, you need to pass a pointer to a BOOL in the lParam. If the child window is maximized, then Windows will set the BOOL pointed to by the lParam to TRUE.

Additional query words:

Keywords : kbMDI kbMenu kbOSWinNT kbOSWin2000 kbSDKWin32 kbGrpDSUser kbOSWin kbWndw

Issue type : kbinfo

Technology : kbWin32SDKSearch kbAudDeveloper kbWin3xSearch kbSDKSearch kbWin32sSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310