Protected Overridable Sub OnDownloading( _
   ByVal percentCompleted As Integer, _
   ByVal bytesReceived As Long, _
   ByVal totalBytes As Long _
) 

Dim instance As ResourceDownloader
Dim percentCompleted As Integer
Dim bytesReceived As Long
Dim totalBytes As Long
 
instance.OnDownloading(percentCompleted, bytesReceived, totalBytes)

protected virtual void OnDownloading( 
   int percentCompleted,
   long bytesReceived,
   long totalBytes
)

protected procedure OnDownloading( 
    percentCompleted: Integer;
    bytesReceived: Int64;
    totalBytes: Int64
); virtual; 

protected function OnDownloading( 
   percentCompleted : int,
   bytesReceived : long,
   totalBytes : long
);

protected: virtual void OnDownloading( 
   int percentCompleted,
   long bytesReceived,
   long totalBytes
) 

protected:
virtual void OnDownloading( 
   int percentCompleted,
   int64 bytesReceived,
   int64 totalBytes
)