RE: Can't close my form. Close() isn't doing it.

["Phillip Woon" <phillipwoon@erols.com>]

Well, the form hasn't been created as yet, so calling close() won't close
it.  There may be two things you could do.  Use Perform() to send a message
to itself to close.  when it receives the message, call the Close().
otherwise, set a timer, and when the timer fires, call the close().

> -----Original Message-----
> From: owner-cpb-thread@zdtips.com [mailto:owner-cpb-thread@zdtips.com]On
> Behalf Of Daniel Hallmark
> Sent: Monday, October 05, 1998 11:11 AM
> To: cpb-thread@zdtips.com
> Subject: Re: Can't close my form. Close() isn't doing it.
>
>
> On Sat, 3 Oct 1998, Aurora wrote:
>
> > Now the pgm has no probs exitting if I close on a button event, but from
> > FormCreate it won't work... I have my theories... I need solutions... :(
>
>
> I don't know if this will work for you, but I ran into a similar problem.
>
> First some background:
> I write a lot of console CGI applications to process user input and
> return files/data/etc from my company's website.  The latest application
> had to create some graphs based on the numeric data I retrieved.  I tried
> to use dynamically allocated Teechart components, but at some point they
> were throwing an exception because they needed a window handle and
> didn't have one.
>
> My next plan was to create a form with the charts on them.  I could then
> dynamically create the form and call its OnShow event from insde the
> console app.  In the form's OnShow event I built the charts and saved
> the images to disk.  Then I called Close() at the bottom of the OnShow
> event because I needed the form to close itself automatically without
> requiring any manual intervention.
>
> The problem I ran into was that when the webserver ran the app, it would
> hang up.  After running the chart module thru the debugger I got an
> EInvalidOperation exception that said you couldn't modify the Visible
> property (which Close() does) inside the OnShow event.
>
> My final solution was to call form->Show and form->Close both from the
> external console part of the application instead of trying to have the
> form close itself.  I don't know if you can write some kind of a wrapper
> for your form, but maybe that would let you close the form and then
> terminate the app in a separate step.
>
> Hope this helps :)
> Daniel Hallmark
>
> original method:
> //inside console app
>   TfrmChart *chart = new TfrmChart(0);
>   chart->Show();
>   delete chart;
> //end of consol app
> //inside TfrmChart::OnShow
>   // build charts and save to disk
>   Close(); // automatically close form -- this raises exception
> //end of TfrmChart::OnShow
>
> new method:
> //inside console app
>   TfrmChart *chart = new TfrmChart(0):
>   chart->Show();    // if you need user interaction here ShowModal()
>   chart->Close();
>   delete chart;
> //end console app
>