Hi, Try the following.... Go to the .Net command prompt & enter the command below: RegAsm api_name.dll /tlb:api_Name.tlb /codebase Note: It will register into GAC & export a tlb file. Thanks Md. Marufuzzaman

Hi Calla, Thanks for the reply. I'll surely try the System.Security namspace. Yesterday, I have found something interesting in MSDN. They are using scripts (JScript, VBScript or Shell Script) for managing Group Policies. But I dont know even 'S' of scripting langauges. Lets see how much I can progress in that foeld with C#. Bye.

I guess Application Verifier use more strict strategy, just like you can compile project with /W4 option.