| Microsoft XML Core Services (MSXML) 5.0 for Microsoft Office - DOM Developer's Guide |  |
Use OnReadyStateChange in Visual C/C++ Applications
In C++, use connection points to trap all XMLDOMDocument events. The DISPID of the connection point container is DIID_XMLDOMDocumentEvents. The DISPID for the connection point to trap the readystatechange event is DISPID_XMLDOMEVENT_ONREADYSTATECHANGE.
For a C/C++ example, see onreadystatechange Event.