Public Sub RegisterHiddenField( _
   ByVal control As Control, _
   ByVal hiddenFieldName As String, _
   ByVal hiddenFieldInitialValue As String _
) 

Dim instance As ClientScriptProxy
Dim control As Control
Dim hiddenFieldName As String
Dim hiddenFieldInitialValue As String
 
instance.RegisterHiddenField(control, hiddenFieldName, hiddenFieldInitialValue)

public void RegisterHiddenField( 
   Control control,
   string hiddenFieldName,
   string hiddenFieldInitialValue
)