DISP_PROPERTY_EX
Defines an OLE automation property and name the functions used to get and set the property's value in a dispatch map.
DISP_PROPERTY_EX(theClass, pszName, memberGet, memberSet, vtPropType )
The memberGet and memberSet functions have signatures determined by the vtPropType argument. The memberGet function takes no arguments and returns a value of the type specified by vtPropType. The memberSet function takes an argument of the type specified by vtPropType and returns nothing.
The vtPropType argument is of type VARTYPE. Possible values for this argument are taken from the VARENUM enumeration. For a list of these values, see the Remarks for the vtRetVal parameter in DISP_FUNCTION. Note that VT_EMPTY, listed in the DISP_FUNCTION remarks, is not permitted as a property data type.
