gth theme question

[Jakub Lukomski <qba best net pl>]

when i compiled some programs using GTK+-1.2 libs, they used the pre-set 
gtk theme, however after changing to GTK+-2.0, instead of themes the 
winow contents were just plain gray. is it that 2.0 version uses it's 
own themes, or there is some additional function i need to use to make 
the window use the themes?
thanx for any answers
           Jakub "arakell" Łukomski