Pop up form on closing

I have been requested to add a pop up form when the user chooses to quit the application.
The form needs to stay visible until the application is finished with all its clean up code and then close down.

Can anyone point me in the right direction as when it comes down to threading I really suck.

Thanks In Advance :wave:

Why don't you disable the cose_event when the procedure is still running, or create a messagebox when trying to close the form? Think that would be the best/most easy solution.

Untested:

vb.net Code:

Private f As Form
 
Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
    Call New Thread(AddressOf ShowF).Start()
End Sub
 
Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles Me.FormClosed
    f.Invoke(New MethodInvoker(AddressOf f.Close))
End Sub
 
Private Sub ShowF()
    Me.f = New Form
 
    f.Show()
End Sub

It would be more appropriate to use the application's Shutdown event than the form's FormClosed event but you get the idea. Very easy so maybe having a go yourself would have been worth a try.