while(1)
{
MOUSE_POS.X = POINTER.X; MOUSE_POS.Y = POINTER.Y;
temp.x = MOUSE_POS.x;
temp.y = MOUSE_POS.y;
temp.z = 50;
vec_for_screen(temp,CAMERA);
vec_set(player.x,temp);
wait(1);
}

in this case player will be at the cursor pos and 50 quants front of the camera.

This is what you want to make?

Never say never.