Hi; I'm a VB.net programmer and I want to send files from my program (on my PPC) to other devices (like my PC) . I use " ObexWebRequest " and it works successfully . But it causes a sleep in my program and my program doesn't work until send operation be come completed. Now, I want to show a progress-bar and sent bytes value to user . Please help me to solve my problem . Thanks .

That's not very straightforward with the ObexWebRequest class; it has basic support for running in the background, but there is no support for progress reporting.  I suggest you see our companion library Brecham.Obex which support progress reporting directly, see http://inthehand.co.uk/files/folders/objectexchange/entry6351.aspx and http://www.alanjmcf.me.uk/ThirdParty/Brecham.Obex library/.