Thks again! Greate,Use the hook can figure out my "Question". [See here](http://support.microsoft.com/default.aspx?scid=kb;en-us;318804)[[^](http://support.microsoft.com/default.aspx?scid=kb;en-us;318804 "New Window")]

change the p.Width = 1.5f; to p.Width = 10f; you can see the left and top line were drawed.

hwswin wrote: It's not a easy thing,right? As there's no common interface to access child controls, I'm afraid not. Regards Senthil [MVP - Visual C#] _____________________________ My Home Page |My Blog | My Articles | My Flickr | WinMacro