with DOS/4GW? - Open Watcom

DOS Programming Guide
#pragma off (check stack)
void loadds far click handler (int max, int mcx, int mdx)
{
#pragma aux click handler parm [EAX] [ECX] [EDX]
mouse event = 1;
mouse code = max;
mouse cx = mcx;
mouse dx = mdx;
if( mouse code & 8 ) right button = 1;
}
#pragma on (check stack)
void main( void )
{
struct SREGS sregs;
union REGS inregs, outregs;
int installed = 0;
int orig mode = 0;
int far *ptr;
int (far *function ptr)();
segread(&sregs);
/* get original video mode */
inregs.w.ax = 0x0f00;
int386( 0x10, &inregs, &outregs );
printf( "Current Mode = %u\n",
orig mode=outregs.h.al );
/* check for mouse driver */
inregs.w.ax = 0;
int386 (0x33, &inregs, &outregs);
if( installed = (outregs.w.ax == -1) )
printf( "Mouse installed...\n" );
else
printf( "Mouse NOT installed...\n" );
if( installed ) {
/* goto graphics mode */
inregs.h.ah = 0x00;
inregs.h.al = 0x4;
int386( 0x10, &inregs, &outregs );
/* show mouse cursor */
inregs.w.ax = 0x1;
int386( 0x33, &inregs, &outregs );
/* set mouse cursor form */
inregs.w.ax = 0x9;
inregs.w.bx = 0x0;
inregs.w.cx = 0x0;
ptr = cursor;
inregs.x.edx = FP OFF( ptr );
sregs.es = FP SEG( ptr );
int386x( 0x33, &inregs, &outregs, &sregs );
34 How Can I Use the Mouse Interrupt (0x33) with DOS/4GW?