Input the username&password Automatically on the 802.1x client

Select 802.1x Network Authentication and the md5-challenge.When the windows client access the 802.1x Restricted Network, the windows raises a dialog to query the username&password.

Now I want to disable the dialog and automatically input the username&passowrd by my program.I am Confused how to do. I have no any idea.Please help me.Many thanks.