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#### 21.1.6 Remarks

Although having different APIs and the appearance of a different interaction behaviour, the way timers and timeout callbacks work is almost identical with one exception: you can deactivate a timer by deactivating the form it belongs to. While the form is deactivated, the timers callback will not be called, even if it expires. The interaction will only resume when the form is activated again.

See `timer.c` for the use of timers.