Microsoft KB Archive/95391

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BUG: Superclassed Scroll Bar's Parent Not Sent WM_CTLCOLOR Msg

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Q95391

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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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SYMPTOMS
Controls normally send WM_CTLCOLOR messages to their parents so applications can modify the control background color. However, under Windows 3.0 and 3.1, when a scroll bar is superclassed, its parent is not sent WM_CTLCOLOR messages.

RESOLUTION
Applications that want to receive the WM_CTLCOLOR message must subclass the scroll bar rather than superclassing its window class.

STATUS
Microsoft has confirmed this to be a bug in Windows versions 3.0 and 3.1.

Additional query words: scrollbar

Keywords : kb16bitonly kbCtrl kbScrollBar kbGrpDSUser kbOSWin310 kbOSWin300

Issue type : kbbug

Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK300 kbWinSDK310