System.Web Namespace   HttpWorkerRequest Class

Adds the contents of the specified file to the response and specifies the starting position in the file and the number of bytes to send.

[ VB ]
<ComVisible ( False ) >
MustOverride Overloads Public Sub SendResponseFromFile ( _
   ByVal handle As IntPtr, _
   ByVal offset As Long, _
   ByVal length As Long _
)

[ C# ]
 [ ComVisible ( false ) ] 
public abstract void SendResponseFromFile (
   IntPtr handle,
   long offset,
   long length
);

[ C++ ]
 [ ComVisible ( false ) ] 
public: virtual void SendResponseFromFile (
   IntPtr handle,
   __int64 offset,
   __int64 length
) = 0;

[ JScript ]
public ComVisible ( false ) 
abstract function SendResponseFromFile (
   handle : IntPtr,
   offset : long,
   length : long
);