Invisible/Hide Mouse Pointer in C

#include<graphics.h>
#include<conio.h>
#include<dos.h>
 
int initmouse();
void showmouseptr();
void hidemouseptr();
 
union REGS i, o;
 
main()
{
   int status, count = 1, gd = DETECT, gm;
 
   initgraph(&gd,&gm,"C:\\TC\\BGI");
 
   status = initmouse();
 
   if ( status == 0 )
      printf("Mouse support not available.\n");
   else
   {
      showmouseptr();
 
      while(count<=10)
      {
         getch();
         count++;
         if(count%2==0)
            hidemouseptr();
         else
            showmouseptr();
      }
   }
 
   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 hidemouseptr()
{
   i.x.ax = 2;             // to hide mouse
   int86(0X33,&i,&o);
}