c program to restrict mouse pointer

by Subramanian 2012-09-10 19:33:43

This program restricts mouse pointer in a rectangle. When this program is executed the mouse pointer is restricted in a rectangle i.e. you can't move mouse pointer out of the rectangle.

#include<dos.h>
#include<graphics.h>
#include<conio.h>

int initmouse();
void showmouseptr();
void hidemouseptr();
void restrictmouseptr(int, int, int, int);

union REGS i, o;

main()
{
int status, gd = DETECT, gm;

initgraph(&gd,&gm,"C:\\TC\\BGI");
settextstyle(DEFAULT_FONT,0,2);

status = initmouse();

if ( status == 0 )
outtext("Mouse support not available.\n");
else
{
showmouseptr();
rectangle(120,70,520,410);
restrictmouseptr(120,70,520,410);
}

getch();
return 0;
}

int initmouse()
{
i.x.ax = 0;
int86(0X33,&i,&o);
return ( o.x.ax );
}

void showmouseptr()
{
i.x.ax = 1;
int86(0X33,&i,&o);
}

void restrictmouseptr(int x1, int y1, int x2, int y2)
{
i.x.ax = 7;
i.x.cx = x1;
i.x.dx = x2;
int86(0X33,&i,&o);

i.x.ax = 8;
i.x.cx = y1;
i.x.dx = y2;
int86(0X33,&i,&o);
}


Output of program:

untitled.PNG
486
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