ID Number: Q66287
5.00 5.10 6.00 6.00a 6.00ax 7.00
MS-DOS
Summary:
In Microsoft C versions 5.0, 5.1, 6.0, 6.0a, 6.0ax, and C/C++ version
7.0, the _getvideoconfig() run-time library function returns, among
other things, the type of the current display adapter. The possible
return values are documented. However, what if the adapter does not
match any of the cards represented by the nine manifest constants
defined in graph.h?
When the adapter is recognized as a "superset" of an adapter that is
supported, the value of the supported adapter is returned. For
example, if the adapter is a Super VGA card, the value _VGA is
returned.
When the active adapter is completely unrecognized, the
_getvideoconfig() function returns the least common denominator. If
the adapter supports color, _CGA is returned; otherwise the return
value is set to _MDPA.
A good programming strategy to reduce device dependencies is to use
_MAXRESMODE or _MAXCOLORMODE when calling _setvideomode(), and using
_getvideoconfig() to determine what mode was actually set. There is
more information on these topics in the Microsoft Advisor online Help
system that is included with your C compiler package.
Additional reference words: 5.00 5.10 6.00 6.00a 6.00ax 7.00