Avoiding resizing of frames in Tkinter

[Jørgen Hansen]

Dear all,

I am making a nice array editor dialog in Tkinter. I have modified the
Dialog class in the tkSimpleDialog module.

My question is, how do I avoid that the buttonbox gets resized or more
generally how does one avoid a frame getting resized? I can't seem to
find it anywhere in "An Introduction to Tkinter" by Fredrik Lundh.

thanks

Jorgen