Event processing and QuitUserInterface

Dear experts,

I have a very basic question

I have a button leave with a callback routine associated that looks like:

If (event is EVENT_COMMIT)
{
free dynamic memory

close open files

QuitUserInterface (0);

}

Now, it turns out that if a user is looking forward, he can hit the button leave twice and, of course, the callback routine is called twice, too, which causes an accident because the dynamics of memory has been released already in the first call. I would have assumed that after QuitUserInterface, no other event is handled... but it seems that pending events are still processed. Is this right?

My solution to the problem would be to use a toggle setting to ensure that the callback is called once. But I wanted to (better) understand the treatment in the case of the event.

Thank you!

Hello Wolfgang,.

I normally returns the order of operations to close the app: QuitUserInterface first of all, all the other tasks in the main function after RunUserInterface line. It also avoids events triggered, because the application is not over their treatment.

Tags: NI Software

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