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Cannot Change Visible Onshow Onhide Delphi

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. Below is the code that generates this error: try MainMenuForm.Hide; except on E:Exception do begin dbox ('Menuformhide:' + string (E.Message)); end; end; And believe this happens only on some systems, not 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, http://electrictricycle.net/cannot-change/cannot-change-visible-in-onshow-or-onhide-delphi.html

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I need the following information: 1. There are a couple of suggestions there. 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; Justamente numa linha onde eu dou o comando: frmPrincipal.Hide; Ja reinstalamos o delphi 7 com todos os componentes, jedi reportbuilder, eurekalog e machineid mas o problema persiste.

Estou usando no evento OnPaint... cannot change visible in onshow or onhide 8. Why do some airlines have different flight numbers for IATA and ICAO? Developer Tools Blackfish SQL C++Builder Delphi FireMonkey Prism InterBase JBuilder J Optimizer HTML5 Builder 3rdRail & TurboRuby Database Tools Change Manager DBArtisan DB Optimizer ER/Studio Performance Center Rapid SQL Technical Articles

Is there a name for the (anti- ) pattern of passing parameters that will only be used several levels deep in the call chain? Again, we cannot see your screen from here; you need to give it to us in your question, or we can't help you. –Ken White Jul 19 '12 at 12:47 add Privacy Terms of use site map Board index » delphi » 'Cannot change visible in OnShow or OnHide' error eric Delphi Developer Mon, 10 Mar 2008 21:14:15 GMT 'Cannot change http://www.delphipages.com/forum/showthread.php?t=212107 Workarounds None Attachment None Comments Lucian Radulescu at 8/21/2009 11:28:13 AM - >I need to hide the main form on application's start You can use Application.ShowMainForm := FALSE; you can safely

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You Application.ProcessMessages call opens the doors for such madness . http://www.delphigroups.info/2/fe/408402.html python error in datetime View All Products API Readiness Ready! Find all posts by Norrit #3 07-19-2012, 01:30 PM Syamala Junior Member Join Date: Jul 2012 Posts: 8 I am not getting that error , I faced that Join Us! *Tek-Tips's functionality depends on members receiving e-mail.

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How small could an animal be before it is consciously aware of the effects of quantum mechanics? Btw: colleague's IDE layout setting is "classic undocked" and he never had this problem. 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 have a peek at these guys I couldn't recreate that error in my system.

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Try disabling all experts. 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 The exception is created if some code executing in response to a CM_SHOWINGCHANGED message tries to show or hide the form. Why put a warning sticker over the warning on this product?

Madhu Kumar. "Liz" wrote in message news:[email protected] > Madhu Kumar wrote: > > > try > > MainMenuForm.Hide; > > except > > on E:Exception do > > begin > in form's OnPaint event handler write "Hide", like this: procedure TForm1.FormPaint(Sender: TObject); begin Hide; end; 3. TestComplete General Discussions I am needing to extract TestExecute.exe from comma... check my blog The solution is to change your code so that you no longer try to change the visibility of a control at such an event.

How to convert numbers to currency values? One Very Odd Email The 10'000 year skyscraper Add-in salt to injury? Se alguem sober e puder nos ajudar! But something like bugfix is still missing :/ (WinXP, TurboDelphi 2006) share|improve this answer answered Jan 27 '09 at 8:34 Adam add a comment| Your Answer draft saved draft discarded

Its important for me. TestComplete General Discussions Invalid Number of Paramters TestComplete General Discussions TestExcute logs cant be viewed TestComplete General Discussions Find More Solutions Latest Topics playback now does entire project instead of single... Why do I never get a mention at work? Without opening the PHB, is there a way to know if it's a particular printing?

Know what you're looking for? 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. If so, this is a duplicate of Error Cannot change Visible in OnShow or OnHide in Delphi IDE. Join UsClose Log On Embarcadero Home Watch, Follow, & Connect with Us Share This QualityCentral Communities Articles Blogs Resources Downloads Help QualityCentral Delphi-BCB VCL Additional Controls Action Bar Controls TBevel

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