Returns a value for the maximum number of pages an extension object will add to the property sheet.
See IExchExtPropertySheets : IUnknown.
ULONG GetMaxPageCount(
ULONG ulFlags
);
Microsoft Exchange calls the IExchExtPropertySheets::GetMaxPageCount method when it is allocating memory for the property sheet page array. The value returned by this method represents the maximum number of pages to be shown at any one time, not the sum of all property sheet pages for all objects.