change function quit_program to this:
Code:
function quit_program()
{
     sys_exit(NULL);
}


and change function main to this:
Code:
function main()
{
     video_mode = 7;
     screen_color.blue = 150;
     mouse_mode = 2;
     mouse_map = mouse_bmap;
     while(1)
     {
          mouse_pos.x = mouse_cursor.x;
          mouse_pos.y = mouse_cursor.y;
     }
}


and add this line in your script:
Code:
BMAP* mouse_bmap = "mouse.pcx";

(replace "mouse.pcx" by your cursor sprite)