🚀 go-pugleaf

The TList is exactly how I went about it.  Thanks to you and Bruce for your
help.

"Sundial Services" <info_NS1@sundialservices.com> wrote in message
news:3B45F003.2FA5@sundialservices.com...
> An application can have as many windows open as it wishes; including, if
> you like, multiple copies of the same form.  (You simply must be sure
> that you keep each TForm object separate from the others, e.g. in a
> TList.  You can't use Delphi's standard trick of creating a global
> variable to hold it.)
>
> Intrinsically, a form .. any Windows window .. is dependent upon the
> Windows software to draw and maintain it, and this occurs through the
> use of Windows messages.  Only one thread (the main thread) should be
> having anything to do with Windows messages.  It can, however, support
> any number of windows at the same time.  (All the messages for all the
> windows flow through it.)
>
>
>
>
> >Sterling Bates wrote:
> >
> > I'm use several TThreads to spawn instances of the same form multiple
times;
> > ie:
> >
> > procedure TSpawnFormThread.Execute;
> > begin
> >     FreeOnTerminate := true;
> >     with TMyForm.Create(nil) do
> >     begin
> >         ShowModal;
> >         Release;
> >     end;
> > end;
> >
> > This tends to create interesting errors (window handle no longer valid)
on
> > the Release of the form, and the message "Canvas does not allow drawing"
> > when activating a form (this primarly caused, it seems, by TRichEdit).
> >
> > Another poster mentioned that only the main VCL thread properly handles
> > forms, but need to know if there's an elegant way to work with this.
> >
> > Note: I *do* need to pop up multiple instances of the same form -- I'm
open
> > to suggestions on other ideas.
>
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