Default Controls Style not the same as no style given

Hi, I have a question regarding the default style used by Controls (under Windows 7 / 8, not tested under other platforms). When I create a Slider {} or make a Slider { style: SliderStyle {} } I don’t end up with the same widget at all (used the slider since it’s probably one of the most visual obvious one). I was wondering which style is used by default for the widget (Base, Desktop…)? Any way to used it or make it with style like SliderStyle? This make it hard to make a simple modif to style and keep a coherent look with the not styled controls. We have a fully skinned style or offer native style into the application and can switch between both during runtime. The native look with a few modif (like font size) is the part where things get ugly. Thanks, Jerome