Opening "Select User And Groups" Dialog Box

Did you download the sample projects? Did you refer the FAQ? Didi you try to post the same question there?

yes i read part 3, i event toke the interop dll, imported into project, but i still get an error of a missing com+ dll. maybe some one managed to do it in some other way?

Please be more specific. What do you need help with? Did you read Part 3 of that article?