I created a main form which had a few sub-forms in the format of tab control. The main form has a couple of lines that I want to be visible all the time. The problem I experienced was: whenever I clicked a tab for the subform, the couple of lines on the main wasa out of screen; in other words, the subform took the whole screen. I had to use the scrool bar to move it back.
All I want is to make the screen stable when I click a subform. Don't let subforms go up or down.

It seems that Form properties such as "Can grow" and "Can Shrink" don't help.

Anyone can give me a hand? Thanks in advance.