Markus Humm wrote: > I don't call processmessages and the like directly in the event but > might output some lines on screen for debugging.
How? ShowMessage is a modal form. > > Other thing: what about critical sections. Would they be safe for > preventing this in my situation? No, critical sections would be working only when they are used from multiple threads. You could try something like below, is the exception raised? var AFlag:Boolean procedure TForm.WSocketDataAvailable(Sender: TObject; ErrCode: Word); begin if AFlag then raise Exception.Create('reentered'); AFlag := TRUE; try [..] finally AFlag : FALSE end; end; --- Arno Garrels [TeamICS] http://www.overbyte.be/eng/overbyte/teamics.html > Greetings > > Markus -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be