Public Shared Sub RegisterHiddenField( _
   ByVal fieldName As String, _
   ByVal fieldValue As String, _
   ByVal page As Page _
) 

Dim fieldName As String
Dim fieldValue As String
Dim page As Page
 
RenderUtility.RegisterHiddenField(fieldName, fieldValue, page)

public static void RegisterHiddenField( 
   string fieldName,
   string fieldValue,
   Page page
)