This method allows a control to receive messages.
HRESULT ReceiveMsg( long uMsg, long wParam, long lParam );
NOERROR indicates success. S_FALSE indicates that the control did not handle the message. If an error occurs, the appropriate HRESULT value is returned.
If a message sink exists, the control forwards the message to its IASEventSink::ReceiveMsg method. WM_CHAR messages are handled by IASControl::KeyPress.
IASControl::KeyPress, IASEventSink::ReceiveMsg