asked on

Saving data when application exits

the aim is to save (to file) some data when the application exits.
I want this to happen even if windows terminates the app when
windows is shutdown. Perhaps I could catch the quit message sent
to the app but I don't have any idea on how to do that.

Thanks in advance

Filipe Correia

ASKER CERTIFIED SOLUTION

kretzschmar

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filipecorreia

ASKER

but... is the form's OnClose event trigered in case the main form is always hiden (by doing Application.ShowMainForm:=false) ? I think it isn't because when I put ShowMessage("hey"); in the OnClose event no message is shown when the app exits.

Filipe Correia

kretzschmar

not the OnClose-event,
the OnCloseQuery-Event is meant

;-)

lucika

If windows terminates the app when windows is shutdown app there comes the message WM_QUERYENDSESSION

edey

But even in the case of a windows shutdown the OnCloseQuery event should still be fired - Kretzschmar is correct.

GL
Mike

malsoft

Also, I was reading a few of the TI's on Borland's website the other day and they stated that if you do have a handler for the OnCloseQuery and set the value of CanClose to False, Windows shutdown can be halted.

rondi

I'd put my code in the OnDestroy event handler.
It's sure to get called there, whatever the reason for
termination.

rondi

filipecorreia

ASKER

I have an option in my app that terminates the app by doing:

Application.Terminate()

When I do that the OnCloseQuery isn't trigered.
To solve this I tried subtitute this code by:

Form1->Close();

and now everything seems to be working fine(I'll test it some more times).

Do you predict any sort of problem that may hapen by doing this?

rondi: I will try your suggestion but I haven't tried it yet.

Filipe Correia

DelRunner

I suggest to use the Close, rather than Terminate or HALT - as these are not polite ways to end your application !

filipecorreia

ASKER

Hi

rondi: An EAccessViolation happens if I use the OnDestroy event. I don't know why!

I'll use the onCloseQuery event. My app seems to be working ok until now.

Thanks to you all

Filipe Correia