public event OnButtonRelease
the event firing control
contains a string, encapsulating the X and Y relative coordinates separated by ":", the number of the mouse button released and the state of the modifier keys(Alt, Shift, Ctrl, etc).
Event triggered by user releasing button.
Evaluating EventData like this :
will give you the x,y,button that was released and the state of the modifier keys.
This event can close the application by returning MSG_APPLICATION_QUIT. Any other return value will be ignored.