[This is preliminary documentation and subject to change.]
Signals the system and accessibility aids that a predefined event occurred.
void WINAPI NotifyWinEvent(
DWORD event,
HWND hwnd,
LONG idObject,
LONG idChild
);
An Active Accessibility server application calls this method to notify the system and accessibility aids that a predefined event occurred within the application. This allows accessibility aids to communicate directly with the server object using IAccessible interface methods.
There is no significant performance penalty for calling this function when no clients of the events are present. The system does not perform any thunking for context switches. Server application developers can call this method with their own events without fear of overhead.