_clearscreen

Description

Clears the specified area of the screen.

#include <graph.h>

void __far _clearscreen( short area );

Remarks

The _clearscreen function erases the target area, filling it with the current background color. The area argument can be one of the following manifest constants (defined in GRAPH.H):

Return Value

None.

Compatibility

Standards:None

16-Bit:DOS

32-Bit:None

See Also

_getbkcolor, _setbkcolor

Example

/* CLRSCRN.C */

#include <conio.h>

#include <graph.h>

#include <stdlib.h>

void main( void )

{

short xhalf, yhalf, xquar, yquar;

struct _videoconfig vc;

/* Find a valid graphics mode. */

if( !_setvideomode( _MAXRESMODE ) )

exit( 1 );

_getvideoconfig( &vc );

xhalf = vc.numxpixels / 2;

yhalf = vc.numypixels / 2;

xquar = xhalf / 2;

yquar = yhalf / 2;

_setviewport( 0, 0, xhalf - 1, yhalf - 1 );

_rectangle( _GBORDER, 0, 0, xhalf - 1, yhalf - 1 );

_ellipse( _GFILLINTERIOR, xquar / 4, yquar / 4,

xhalf - (xquar / 4), yhalf - (yquar / 4) );

_getch();

_clearscreen( _GVIEWPORT );

_getch();

_setvideomode( _DEFAULTMODE );

}