Sends the specified request to the HTTP server, allowing callers to send extra data beyond what is normally passed to HttpSendRequestEx.

C# Signature:

  [DllImport("wininet.dll", CharSet = CharSet.Auto, SetLastError = true)]
  extern public static bool HttpSendRequest(
    [In] IntPtr hRequest,
    [In] string lpszHeaders,
    [In] uint dwHeadersLength,
    [In] IntPtr lpOptional,
    [In] uint dwOptionalLength);

Notes:

None.

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