single sign on

Hi to all...

 

I have an issue plz help meout.

 

I have an application that is web as well as windows .

 

If i login into web application mean while i have a requirement to log into that windows application from web browser tht time i dont want to ask the user for login credentials why because user already logged into the apllication from web browser so i dont want to ask again ......................................that is single sign on.

 

How can i do this one plz help me..........

 

thanx for reply
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