aus der Hilfe:
Zitat:
Occurs when the form loses focus.
property OnDeactivate: TNotifyEvent;
Description
Use OnDeactivate to perform special processing when the form transitions from being the active form to another form in the same application becoming the active form. If activation goes to another application, this event is not triggered. To determine if another application has become active, Use the TApplication object’s OnDeactivate event.
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Klaus