Paul,
the Destroy event should have just oRetVal_Email = null, and in the click you do not need to call Destroy nor Unload, just thisform.Release(), and I think that should do it
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges