Tab Button Goes to Top of Datasheet Form

[Aurillius]

Hi Guys,
I have an Access form that has a query of records that need to be edited...sometimes referencing another screen on a different application.
The issue that my users are experiencing is that when they "ALT+TAB" to another application, the sheet goes back to the top of the access form when they ALT+TAB back. How do I stop this from happening (event trigger)?
Mark