ON_EVENT_REFLECT
Visual Studio 2010
The ON_EVENT_REFLECT macro, when used in the event sink map of an OLE control's wrapper class, receives events fired by the control before they are handled by the control's container.
ON_EVENT_REFLECT(theClass, dispid, pfnHandler, vtsParams )
The vtsParams argument is a space-separated list of values from the VTS_ constants.
One or more of these values separated by spaces (not commas) specifies the function's parameter list. For example:
specifies a list containing a short integer followed by a BOOL.
For a list of the VTS_ constants, see EVENT_CUSTOM.