1. Import the extension!

   • For GM:S, right-click on the Extensions folder in the Resource Tree, pick "Import extension", and choose the downloaded GMEZ.
   • For GM8.x, pick "menu:Scripts ➜ Import Scripts..." and choose window_pointer.gml.
     Then either copy window_pointer.dll to the directory with your GMK/GM81 file or add it to your Included Files.

2. Before you use any extension functions, call window_pointer_init, like so:

   window_pointer_init();
   

   typically in some controller object's Create event

3. Call window_pointer_flush each frame after you've done what you wanted with the extension functions, like so:

   window_pointer_flush();
   

   In GM:S this can be simply added to some "late" event like Draw GUI End.

   If you do not call this function, Pressed/Released states will not be cleared, and old pointers indexes will not be recycled!

All of these take an ind argument, which is a 0-based pointer (touch) index, just like with device_mouse functions in modern GameMaker.

Much like with modern GameMaker, indexes are reused and new pointers occupy use the lowest "available" index.

The extension can store information about up to 256 pointers simultaneously, but hardware rarely supports more than 10, so you might poll only as many as you're willing to handle at any given time.

For example,

for (var i = 0; i < 10; i++) {
    if (window_pointer_check(i)) {
        draw_circle(window_pointer_x(i), window_pointer_y(i), 40, true);
    }
}
window_pointer_flush();