Public Overridable Function IsUserValid( _
   ByVal userName As String, _
   ByVal password As SecureString _
) As Boolean

Dim instance As WorkstationDataAccessAgent
Dim userName As String
Dim password As SecureString
Dim value As Boolean
 
value = instance.IsUserValid(userName, password)

public virtual bool IsUserValid( 
   string userName,
   SecureString password
)

public:
virtual bool IsUserValid( 
   String^ userName,
   SecureString^ password
)