Begins the definition of your control's list of property page IDs.
BEGIN_PROPPAGEIDS(class_name, count )
The name of the control class for which property pages are being specified.
The number of property pages used by the control class.
In the implementation (.cpp) file that defines the member functions for your class, start the property page list with the BEGIN_PROPPAGEIDS macro, then add macro entries for each of your property pages, and complete the property page list with the END_PROPPAGEIDS macro.
For more information on property pages, see the article ActiveX Controls: Property Pages.