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IHttpNegotiate::BeginningTransaction

HRESULT BeginningTransaction(
    [in] LPCWSTR  szURL,
    [in] DWORD  dwReserved,
    [in] LPCWSTR  szHeaders,
    [out] LPWSTR * pszAdditionalHeaders
);		

Notifies the client of the URL being bound to at the beginning of an HTTP transaction.

• Returns one of the following values:

  S_OK	Success, and any additional headers specified are appended.
  E_ABORT	The HTTP transaction has been terminated.
  E_INVALIDARG	A parameter is invalid.

szURL

URL for the HTTP transaction.

dwReserved

Reserved for future use.

szHeaders

Current request headers.

pszAdditionalHeaders

Optional additional headers to append to the HTTP request. If these conflict with existing values in szHeaders, the new request headers take precedence. If pszAdditionalHeaders is set to NULL, no headers are added to the HTTP request.

The URL moniker calls this method before sending an HTTP request. It notifies the client of the URL being bound to at the beginning of the HTTP transaction. It also allows the client to add additional headers, such as Accept-Language, to the request.

See also IHttpNegotiate::OnResponse

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