C Program Handling Mouse

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

void showm()
{
 _AX = 1;
 geninterrupt(0x33);
}

unsigned x = 0,y= 0, button;

void updatestatus()
{
 _AX = 3;
 geninterrupt(0x33);
 x = _CX;
 y = _DX;
 button = _BX;
}

void main()
{
 clrscr();

 _setcursortype(_NOCURSOR);

 showm();

 while(!kbhit())
 {
  updatestatus();

  textcolor(GREEN);
  gotoxy(5,2);cprintf("X = %0.2d", (x / 8 +1));
  gotoxy(5,3);cprintf("Y = %0.2d", (y / 8 + 1));
  gotoxy(5,4);cprintf("Button = %d", button);

 }

}