Closing all windows using control box exit

[Guest_imported]

I have a problem where by the application is not unloaded correctly when the control box exit button is pressed on the top tool bar. I need to keep the control box active so I can minimise. How can I close all active windows when this button is pressed.
Thanks
John Macleod

 

[BBaggins]

Your main form's QueryUnload event supplies an argument called UnloadMode. You can use this to tell how the form came to be unloaded, and perform any necessary cleanup before the unload actually occurs.

UnloadMode values:

0 = closed via control box or "x" button
1 = closed via code, e.g. "Unload frmMain"
2 = closed by Windows because Windows is shutting down
3 = close via Task Manager
4 = MDI parent is closing