Use this macro to enter a property description, property DISPID, and property page CLSID into the object's property map.
PROP_ENTRY( szDesc, dispid, clsid )
[in] The property description.
[in] The property's DISPID.
[in] The CLSID of the associated property page. Use the special value CLSID_NULL for a property that does not have an associated property page.
The BEGIN_PROP_MAP macro marks the beginning of the property map; the END_PROP_MAP macro marks the end.
See the example for BEGIN_PROP_MAP.