Determine how an application is closed

Question

I am trying to determine if my application is closed through clicking the "X" on the windows form, or if they clicked an "Exit" button I have on it. Right now I am using StackTrace.GetFrame(someIndex) to determine how, but i am looking for a more definitive way since it looks like these frame orders arent guaranteed. Is there a better way to make the distinction? This is a .NET 3.5 WinForm, and Im writing in C#.

Answer 1

Use a different event to handle your own "Exit" button click. In your own "Exit" event handler do your extra logic, or set some state variable, and then call the normal application close method.

Most some samples of how you have your events wired up and I get give a more detailed example of whe I mean.

It would look something like this:

private void btnMyExit_Click(object sender, EventArgs e)
{
    // TODO: add any special logic you want to execute when they click your own "Exit" button
    doCustomExitWork();
}

public static void OnAppExit(object sender, EventArgs e)
{
    doCustomExitWork();
}

private void doCustomExitWork()
{
    // TODO: add any logic you want to always do when exiting the app, omit this whole method if you don't need it
}

Answer 2

Use the FormClosing event and query the FormClosingEventArgs for the enum CloseReason value.