Hi,
I'm currently working on a patch about trackbar sizes fixes. The main goal of this patch is to get rid off magic values and provide a more generic approach of trackbar computation. Some test cases have shown for example that thumb length doesn't depend on client rect fields. I also use some system metrics values (SM_CYCPATION) to compute some trackbar's elements.
I'll try to send the patch ( screenshots also) as soon as possible.
Stephan