IWinHttpRequestEvents::OnError event

The OnError event occurs when there is a run-time error in the application.

Syntax

void OnError(
  [in] long ErrorNumber,
  [in] BSTR ErrorDescription
);

ErrorNumber [in]: Receives the numerical value of the error. The lower 16 bits of this error number corresponds to one of the errors listed in Error Messages.
ErrorDescription [in]: Specifies a short description of the error which occurred.

This event does not return a value.

Note

For Windows XP and Windows 2000, see the Run-Time Requirements section of the WinHTTP Start Page.

Requirement	Value
Minimum supported client	Windows XP, Windows 2000 Professional with SP3 [desktop apps only]
Minimum supported server	Windows Server 2003, Windows 2000 Server with SP3 [desktop apps only]
Redistributable	WinHTTP 5.0 and Internet Explorer 5.01 or later on Windows XP and Windows 2000.
IDL	HttpRequest.idl