Despite the name, XPBench is not really designed to be a skinning benchmark program (we suggest checking out programs like SkinBench for that).
XPBench is rather specifically designed to query which Windows XP features are supported by a video card/driver combination and then demonstrate the performance improvements supporting the XP APIs makes.
At this time, XPBench checks for the following:
- Does the driver support constant alpha blending (this improves the performance of fade effects as an example)
- Does the driver support per pixel alpha blending (window shadows make use of this)