Form has a before update routine that cancels the update if required fields
are null.  There is a close button and the form's close X is hidden. I wish
to continue allowing users to use the main app X at top RHS to close the app.

The problem is this:
When they do quit, if the form is dirty, the before update message about
required fields appears, but then the app closes and that last dirty record
with a required field null is lost. Is there any way to stop the app closing
until the user either completes the required field or cancels, without
disabling the main app X button?

I thought about warning users if they clicked that main app X, but how to
let the current form know if they have clicked it while the form is dirty and
imcomplete?

Is there any other solution?

nugimac