exclude volume body from static simulation

hi,

I have built a part which consists of a volume-body and surface-bodies.

In the static fem-simulation I would only use the surface-bodies. When I start the static simulation by use of the api and vb.net the volume-body and the surface-bodies are activated.

How can I exclude the volume-body from the analysis.

By user-input it would be a right click on the volume-body and to choose "exclude from analysis".

Is ther a way to do this by vb.net ?

Another problem is then to activate global contact to the part.

SolidworksApi macros