1. Is there any way to prevent the scrollbars in a window from changing size as you move them?

If you're talking about the size of the slider (the little knob you move around, that's what the docs call it) then it appears that you cannot control it's size, as the api does not allow for this (examine tkScrollbar.h).

You could probably hack this together via c, but why would you want this?

You can always emulate a Scrollbar using a Tk::Canvas.

I've checked through the docs and can't seem to find anything about these.

Did you check http://perltk.org? You never know ...

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