List groups set on folder with access levels

Hello,

We have installed BI41 sp4 with tomcat as the application server.

I also have installed BI41 sp4 .NET package with dll’s.

I have a running Visual Studio application  (.NET) which I want to extend with

listing the applied groups set on different folders
with their access levels ( full control, no access, advanced).

I tried to do this first with CrystalDecisions.Enterprise.* references.

I couldn't find a security class.

Then I tried to do this with DSWS dll’s but I didn’t succeed because a method used in example SAP note 1385000 is deprecated.

I couldn't find any document for BI4.1 .NET SDK programming.

Can somebody give me an example how to list the used groups  on a folder with its access level?

Thanks in advance.

Regards

Joek poort