Tkinter optionDB question

[klappnase]

Hello, everyone!

I want to use an optionDB file to get rid of some of the ugly Tkinter
defaults, now at the moment it looks like this:

*font : Helvetica -12
*Entry*background : white
*Text*background : white
*Listbox*background : white

This works fine, however I do not seem to be able to change other
options, like:

*Listbox*selectbackground : blue

and similar things i have tried do not have any effect.
I don't know if this is a syntax problem with the optionDB file or if
it is simply not possible to set some options there.
Does anyone know a manual where I can get a list of possible options
and the correct syntax? Any help would be very appreciated.

Thanks in advance

Michael