>I've got an app where I need to be able to shutdown the program via a button on a form then start up another program. The code looks like:
>
>goApp.OnShutDown()
>ShellExec(lcApp, "open", "Z", lcAppPath)
>
> The ShellExec works fine, but I get an "Object does not exist" error when using the OnShutDown() call. I'm assuming that's because of the shutdown order (ie. an object the form is depending on is released before the form is). Is there some other way I should be handling this?


Just a follow up to this. It looks like the reason this fails is because, during the shutdown, the calling form's Release() method is called. It won't release (since it's still running the OnShutDown() code). Then the shutdown will fail.

I got around this by changing my code in the Click() method on the calling form to:

ShellExec(lcApp, "open", "Z", lcAppPath)
goApp.AddObject('oOnShutDownTimer', 'OnShutDownTimer')
THISFORM.Release()

I'm adding a timer object to the goApp object. It waits a few seconds then fires the goApp.OnShutDown() method. In the meantime the form is released. It works like a charm.