Re: [DUG]: Persistent Main form

[Neven MacEwan]

Title: Message

Bob   If you hack the main program pas file you can get no forms autocreated (It is ideal to have something autocreated such as a Datamodule or the IDE gets bent)   ie  My main programs all look like   begin   {Attempt to create a named mutex}   CreateMutex(nil, false, PChar(AppCentral.AppName));   {if it failed then there is another instance}   if GetLastError = ERROR_ALREADY_EXISTS then begin    {Send all windows our custom message - only our other}    {instance will recognise it, and restore itself}     SendMessage(HWND_BROADCAST, RegisterWindowMessage(PChar(AppCentral.AppName)), 0, 0);     Halt(0);   end;   Application.Initialize;   Application.CreateForm(TISMainDataModule, ISMainDataModule);   SplashForm := TSplashForm.Create(nil);   with SplashForm do   try     if not AppCentral.Developing then     begin       Show;   // show a splash screen       Update; // force display     end;     try   AppCentral.AllOk := ISMainDataModule.Initialise(SplashForm.Panel1);       if AppCentral.AllOK then Application.CreateForm(TISMainForm, ISMainForm);       if not AppCentral.AllOk then Abort;       AppCentral.TitleApplication(ISMainForm);       AppCentral.CheckOk;       AppCentral.HideSplash := true;       SplashForm.Release;       if AppCentral.AllOK then ISMainForm.Show;     except       Application.Terminate;     end;   finally     SplashForm.Release;   end;   Application.Run; end.   in which case thew IDE says that ISMainDataModule is the main form! and ignores the rest   HTH   Neven     ----- Original Message ----- From: Bob Osborn To: Multiple recipients of list delphi Sent: Wednesday, October 02, 2002 2:08 PM Subject: [DUG]: Persistent Main form Hi All   I'm having trouble trying to instantiate the main form for an application by reading it from a resource file.  My objective is to have the form restore itself to the same settings as the previous session when it closed.   I don't have any problems restoring individual controls on the form by streaming them to and from a stream file using the OnCreate and OnClose events, but this seems an inconvenient way of doing it when I ought to be able to restore the form in one go.   I'm able to read and write sub-forms successfully using Read/WriteComponentResFile() and the CreateNew() class method,  but I can't do this with the main form because it is created by Application.CreateForm() which uses the resource file that is compiled into the .exe.  There doesn't seem to be any way of switching TApplication's MainForm to another form and so I can't see an easy workaround (or any workaround) -  but maybe someone else has devised a way to do it.   My apologies if this subject has been thrashed on the list before.     Bob Osborn