PrinterdriverUI

Can somebody tell me where I can get informations about the UI part of a
printerdriver ? I've successfully programmed/hacked the
plotter-printerdriver. But now I want to show my own property page in the
printerdriverdialog that the user see's.
I found that the entrypoint must be DrvDocumentPropertySheets but I did'nt
found any code that constructs UI-Elements like Buttons ?

Thomas
.