active directory

hey guys,
how do i get the user name and then check to see if that user is in the right groups in active directory. please help. thanks

Code:

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Request.ServerVariables("LOGON_USER")

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the code above i believe will get the domain\user login id. but now how do i check that agains my active directory so that if hes in the right group i can let him through if not kick him out. thanks guys

why cant i do this line?

Code:

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Dim dso As IADsOpenDSObject

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it keeps saying that type IADsOpenDSObject is not defined

Do a search for DirectoryService on MSDN, it lets you query the AD/LDAP so that you can see the user's groups and other details that you may need.