>Sergey
>
>I've been having another look and I did spot the problem - my App object holds Editbox controls in a Property that is used to pass Editbox values to a fullscreen editbox form.

That's dangling object reference. See
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfoxtk99/html/FT99J8.asp?frame=true

>
>Thanks
>Kev
>
>What does your ISG stand for? because I am also in a dept called ISG.
>
It's company name: Interconnect Services Group.