Microsoft KB Archive/64434

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The C Graphics Library Supports Only One Video Page

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Q64434

6.00 6.00a 6.00ax 7.00 | 1.00 1.50 MS-DOS | WINDOWS kbprg -- The information in this article applies to: - Microsoft C for MS-DOS, versions 6.0, 6.0a, and 6.0ax - Microsoft C/C++ for MS-DOS, version 7.0 - Microsoft Visual C++ for Windows, versions 1.0 and 1.5 -- SUMMARY ======= Only one video page is allowed in VGA modes with the Microsoft C graphics functions. This is by program design and may change to allow for more video pages in a future version of the compiler. The sample code below uses the _getvideoconfig function to determine the number of video pages available. Sample Code --- #include #include #include void main(void) { struct videoconfig vc; if (!_setvideomode(_VRES16COLOR)) { puts(&quot;Unable to set video mode to VRES16COLOR.&quot;); exit(-1); } _getvideoconfig( &vc ); _setvideomode(_DEFAULTMODE); printf(&quot;Number of video pages: %d\n&quot;, vc.numvideopages); } Additional reference words: kbinf 6.00a 6.00ax 7.00 1.00 1.50 KBCategory: kbprg KBSubcategory: GraphicsIss

Keywords : kb16bitonly

Issue type :

Technology : kbVCsearch kbAudDeveloper kbPTProdChange kbvc150 kbvc100 kbCCompSearch kbZNotKeyword3 kbCComp600DOS kbCComp600aDOS kbCComp600axDOS kbCVC700DOS