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This The purpose of this call is to disable the display of the hourglass mouse pointer.
The module retains a count of how many times Hourglass_On has been called; Hourglass_Off must be called an equal number of times in order for the hourglass to actually vanish. This allows for code which uses the hourglass to safely call other code which uses the hourglass. Hourglass_Smash can also be used to force the hourglass to vanish; this is most useful when dealing with errors, to ensure the mouse pointer returns to a user-friendly state.