Public Overridable Sub CreateUser( _
   ByVal username As String, _
   ByVal password As String, _
   ByVal extraData As String _
) 

Dim instance As DICOMService
Dim username As String
Dim password As String
Dim extraData As String
 
instance.CreateUser(username, password, extraData)

public virtual void CreateUser( 
   string username,
   string password,
   string extraData
)

public:
virtual void CreateUser( 
   String^ username,
   String^ password,
   String^ extraData
)