Microsoft KB Archive/108929

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INFO: Querying Device Support for MaskBlt

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Q108929

3.10 3.50 3.51 WINDOWS NT kbgraphic

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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

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SUMMARY
The Win32 documentation for MaskBlt states:

  Not all devices support the MaskBlt function. An application should call the GetDeviceCaps function to determine whether a device supports this function. To query support for MaskBlt, an application should query the device for BitBlt support by passing RC_BITBLT constant to GetDeviceCaps.

MaskBlt implements transparent blts in Windows NT.

For additional information, please see the following article(s) in the Microsoft Knowledge Base:

"Q89375 Transparent Blts in Windows NT" GDI implements this application programming interface (API) by calling BitBlt. Because BitBlt is implemented at the driver level, applications that calls MaskBlt should check for BitBlt support on the device.

Additional query words: 3.10

Keywords : kbOSWinNT310 kbOSWinNT350 kbOSWinNT351 kbSDKWin32 kbDSupport

Issue type : kbinfo

Technology : kbAudDeveloper kbWin32sSearch kbWin32API