DirectSound Com Interface Import

Question

I am searching since weeks for a solution for my problem but i can t find anything. So I thought this is probably the biggest C#-Forum... I may ask here. The Question is quite difficult to explain so I just copy a link to stackoverflow where i asked before:

http://stackoverflow.com/questions/11382341/translate-c-code-com-interface-to-c-sharp

Again It would be sooooooo nice if someone could help me. I am really such anoyed by that interface but i really want to get i working :)