IWinHttpRequestEvents interface
The IWinHttpRequestEvents interface provides events for Microsoft Windows HTTP Services (WinHTTP). It uses only event methods.
Members
The IWinHttpRequestEvents interface inherits from the IUnknown interface. IWinHttpRequestEvents also has these types of members:
Methods
The IWinHttpRequestEvents interface has these methods.
| Method | Description |
|---|---|
| OnError | Occurs when there is a run-time error in the application. |
| OnResponseDataAvailable | Occurs when data is available from the response. |
| OnResponseFinished | Occurs when the response data is complete. |
| OnResponseStart | Occurs when the response data starts to be received. |
Remarks
The following procedure describes how to register for notifications.
- Get an IConnectionPointContainer interface by calling QueryInterface on an IWinHttpRequest object.
- Call FindConnectionPoint on the returned interface and pass IID_IWinHttpRequestEvents to riid.
- Call Advise on the returned connection point and pass a pointer to an IUnknown interface on an object that implements IWinHttpRequestEvents to pUnk.
Notifications can be terminated by calling Unadvise on the connection point returned in step 2.
To view some code that registers for COM notifications, see the Client section of the COM Connection Points article.
Note
For Windows XP and Windows 2000, see the Run-Time Requirements section of the WinHTTP Start Page.
Requirements
| 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 |
|