Thanks Mark.
I already serach for the wcftestclient.exe , but i am not able to get in my system.Though visual studio is installed.
Yes, i am following the second point only.by creating a WPF application, importing theobjects from the wcf application, placing a window with a button.In the clicked event of the button i am calling the function of the NVO. Its a bit large process.
Regards
Subrat