OFF KBDCancels event branches defined by ON KBD.
Description:
Any KBD events that have been logged but not yet serviced are canceled and the keyboard buffer is cleared.
Execution of an OFF KBD statement within a subprogram will disable the ON KBD definition within the context of the subprogram, but when control is returned to the calling program the ON KBD definition is re-enabled. The keyboard buffer remains cleared.
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