The easiest way is using each room's repeatedly_execute_always function. Insert some code that
Code: ags
(obviously this needs some way of restoring the regular kind, too)
function repeatedly_execute_always () {
if (GetHotspotAt (mouse.x, mouse.y) == 4 && GetCursorMode () == 2) SetLabelText (SOME_GUI, 1, "This is a special action");
}
(obviously this needs some way of restoring the regular kind, too)