DrawSubset question

[wooE]

Hi All,

Is there a way to know the internal workings of
DrawSubset (for meshes)?

Is there source code available of this
method?

I would like to know what settings to the render
pipeline it does. For example, if I set a vertex shader,
does DrawSubset render with this shader or does it
use it's own. What TextureStageStates does it
(temporarily) change? More particular: how can I
influence the way DrawSubset works? I searched the
manuals/web etc but with no result. Please help me
with this.

regards,
Johan