INF: The C 6.0 Graphics Library Supports Only One Video Page

ID Number: Q64434

6.00 6.00a 6.00ax 7.00

MS-DOS

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 <graph.h>

#include <stdio.h>

#include <stdlib.h>

void main(void)

{

struct videoconfig vc;

if (!_setvideomode(_VRES16COLOR)) {

puts("Unable to set video mode to VRES16COLOR.");

exit(-1);

}

_getvideoconfig( &vc );

_setvideomode(_DEFAULTMODE);

printf("Number of video pages: %d\n", vc.numvideopages);

}

Additional reference words: 6.0a 6.00a 6.0ax 6.00ax 2.5 2.51 5.10 5.1

2.0 2.00 2.01 7.00