Engine.GetUserGroup ( userGroupName)
Obtains the User object that represents a specific user group.
Returns NULL if the user group does not exist.
The user group specifies the list of user names that are members of the group and the shared privileges that the members are granted. Use the User.Members property to edit the list of user names. Release your reference to the user group object when you finish using it.
userGroupName As String
[In] Specifies the name of the user group to return.