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Cannot Change Visible Onshow Delphi

Join Us! *Tek-Tips's functionality depends on members receiving e-mail. Join them; it only takes a minute: Sign up Error “Cannot change Visible in OnShow or OnHide” in Delphi IDE up vote 2 down vote favorite I have a very strange Cancel Red Flag SubmittedThank you for helping keep Tek-Tips Forums free from inappropriate posts.The Tek-Tips staff will check this out and take appropriate action. delphi ide share|improve this question edited Oct 2 '08 at 21:01 Jim McKeeth 27k1997166 asked Oct 2 '08 at 7:19 Toon Krijthe 41.6k19110176 Which Delphi version? –Jeroen Wiert Pluimers this content

Try to call the forms Update method instead. When the system times out, or if your computer goes to sleep and then comes back up the system gives an error: " Cannot change Visible in OnShow or OnHide." Can asked 8 years ago viewed 5881 times active 6 years ago Linked -1 Cannot change Visible in OnShow or OnHide Related 2Changing CURRENT save/default directory in Delphi 2007 without using Save-As0How Encontrar Todos los Mensajes de Neftali « Tema Anterior | Próximo Tema » Herramientas Mostrar Versión Imprimible Enviar por Correo Desplegado Mode Lineal Cambiar a Modo Hibrido Cambiar a Modo Hilado http://stackoverflow.com/questions/11560244/cannot-change-visible-in-onshow-or-onhide

Thread Tools Display Modes #1 07-19-2012, 12:53 PM Syamala Junior Member Join Date: Jul 2012 Posts: 8 Error "Cannot change Visible in OnShow or OnHide" in Delphi i Estoy haciendo una aplicación que lo que hace es ir mostrando pantallas una tras otra de forma circular, dependiendo de si en una tabla se ha asignado un valor de tiempo You Application.ProcessMessages call opens the doors for such madness . more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

Find all posts by Norrit « Previous Thread | Next Thread » Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Vladimir Panarin at 10/21/2009 11:12:01 PM - Sure, Tomohiro. Were the Smurfs the first to smurf their smurfs? API Platform and Tools Service Virtualization/Virtual Server SoapUI NG LoadUI NG Ready!

Can one bake a cake with a cooked egg instead of a raw one? Visible and Onshow/Onhide problem 9. If you have any problems with the registration process or your account login, please contact contact us . http://www.delphipages.com/forum/showthread.php?t=212107 Browse other questions tagged delphi delphi-7 or ask your own question.

Not the answer you're looking for? The exception is created if some code executing in response to a CM_SHOWINGCHANGED message tries to show or hide the form. n-dimensional circles! LinkBack Thread Tools Display Modes 05-16-2015, 09:03 #1 (permalink) bhirav jaiswal Freak Poster Join Date: Sep 2011 Posts: 146 Member: 1656201 Status: Offline Thanks Meter: 18 cannot

The error might be in one of theese. //Nordlund Red Flag This Post Please let us know here why this post is inappropriate. http://www.delphigroups.info/2/fe/408402.html Reproduce the problem. 4. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. It happens only if XP Theme if active, if Classic Theme is active - all is fine.

By joining you are opting in to receive e-mail. news Quote> What can I check to see if it is already showing before calling > show? (Or do I need to keep track of it myself?) Given the code snipped above The solution is to change your code so that you no longer try to change the visibility of a control at such an event. Or use the same test TCustomForm.CMShowingChanged uses to fire off the error: if not (fMsgWnd.Showing or (fsShowing in fMsgWnd.FormState)) then begin fMsgWnd.Show; fMsgWnd.Update; end;

I use GExperts. Are “Referendum” and “Plebiscite” the same in the meaning, or different in the meaning and nuance? getting error cannot change visible in onshow or onhide 2. http://electrictricycle.net/cannot-change/cannot-change-visible-in-onshow-or-onhide-delphi.html There are a couple of suggestions there.

ErrorMessage: Cannot change Visible in OnShow or OnHide 5. Cannot change Visible in OnShow or OnHide. Here's Why Members Love Tek-Tips Forums: Talk To Other Members Notification Of Responses To Questions Favorite Forums One Click Access Keyword Search Of All Posts, And More...

Have fun :) –Lars Truijens Oct 2 '08 at 14:55 Thanx i will ;-) –Toon Krijthe Oct 2 '08 at 15:34 If its sooo occasional it could

Cannot change Visible in OnShow or OnHide problem 3. If not, then it's probably not a 3rd party component that causes problems, but an expert you have added to the Delphi. So far, I have not seen any issues. -Eric Other Threads 1. What can I check to see if it is already showing before calling show? (Or do I need to keep track of it myself?) Thanks, -Eric Team Delphi Developer Tue,

Temas Similares Tema Autor Foro Respuestas Último mensaje bucle entre edit.change y edit.change alremo81 Varios 2 07-04-2008 16:25:39 ¿Cómo cancelar OnShow? Player claims their wizard character knows everything (from books). But if this form contains a TBitBtn control, this results in error "Cannot change Visible in OnShow or OnHide". check my blog Please tell me the reason and solution –Sym Jul 19 '12 at 12:41 1 I've asked you for more information (several questions).

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in form's OnPaint event handler write "Hide", like this: procedure TForm1.FormPaint(Sender: TObject); begin Hide; end; 3. Does every interesting photograph have a story to tell? Or study the OnShow and try figuring out what could raise this error. This form was originally only used prior to application.run and so needed the application.processesmessages in order to see the updates while creating other startup stuff.

make sure, that XP Theme is active; 4 compile and run your application. Do students wear muggle clothing while not in classes at Hogwarts (like they do in the films)?