TCustomApplicationEvents.OnDeactivate Event

Occurs when an application becomes inactive.

Pascal

property OnDeactivate: TNotifyEvent;

C++

__property TNotifyEvent OnDeactivate;

Description

Write an OnDeactivate event handler to perform any special processing that should occur immediately before the application is deactivated. The OnDeactivate event occurs when the user switches from the application to another Windows application.

Note: Call the CancelDispatch method from an OnDeactivate event handler to prevent the application from forwarding the event to any other application events objects.

C++ Examples:

Copy Code

/*
This example requires a TApplicationEvents and a TListBox
in the form.  Select the TApplicationEvents, double click
on the OnActivate event and add the following code
to the handler.  These events occur when the form gains
or loses focus.
*/
void __fastcall TAppEventForm::ApplicationEventsActivate(TObject *Sender)
{
     lbOther->Items->Add("Event OnActivate");
}

void __fastcall TAppEventForm::ApplicationEventsDeactivate(TObject *Sender)
{
    lbOther->Items->Add("Event OnDeactivate");
}

Delphi Examples:

Copy Code

{
This example requires a TApplicationEvents and a TListBox
in the form.  Select the TApplicationEvents, double click
on the OnActivate event and add the following code
to the handler.  These events occur when the form gains
or loses focus.
}
procedure TMainForm.ApplicationEventsActivate(Sender: TObject);
begin
  lbOther.Items.Add('Event OnActivate');
end;

procedure TMainForm.ApplicationEventsDeactivate(Sender: TObject);
begin
  lbOther.Items.Add('Event OnDeactivate');
end;