+4  A: 

Make Log's Anchor property= Top|Left|Bottom. Make tab control's Anchor property = Top|Left|Bottom|Right

Jacob Seleznev
Thanks. I didn't realize it would resize to compensate for that.
ryeguy
+1  A: 

If you anchor to the top, it'll move the whole control up and down. If you anchor to top+bottom, it'll stretch the control so that it grows as the form grows.

Jason Williams