Reshaping a window along with it's subwindows

[olivegreen]

Hi i am a novice ,and need some help..
how can i reshape a window along with its subwindows...so that each dispay on the scrren (including those visible in the subwindows) are changed proportionatly....

[dletozeun]

This is not related at all to OpenGL, it depends only on the tool you are using to create your GUI.