I have a form with a pageframe and three tabs. Each tab has one of two grids. When the first first comes up and I click into a grid the screen shifts downward a small amount. It only happens when I click into a grid and once it moves it doesn't display that behavior again unless I leave the form and go back to it.

Any ideas what is happening and how to prevent it? It not a big deal but is annoying to the user?

Gaylen