loosing lines on main form after navigating to another tab

[psalmon]

I have a main form that displays four lines of data. I have a tab control with 3 tabs. The form displays perfectly until I navigate to one of the other tabs and back to the main tab. It appears to scroll down a couple of lines and I loose the top line of data.

Any idea what is happening or how to stop it?

 

[psalmon]

it seems that my tab control was too large and was scrolling. I made it smaller and now it is OK.