I am a developer of the game.
UI Library is using the current game.
Here in the Flash (F-In-Box In Use.) Contol of the UI to add to the problems encountered.
(Note, using previously Flash.ocx Flash (SWF) was being used by the UI in the Control.)
F - IN-Box provides the DirectX sample was added to the UI Control based, recycled within the existing SWF Click the left mouse button several times (3-6 times) has been repeatedly available.
Additional information is obtained by tracing the last point.
When you create a window with WS_VISIBLE states that this problem does not occur.
In contrast, the inactive WS_VISIBLE click multiple times to the response.