With FORMAT_EXTENSIONS defined, WideFormat will accept more argument types
than Borland's Format function. In particular, it will accept Variant
arguments for the D, E, F, G, M, N, U, and X format types, it will accept
Boolean and TClass arguments for the S format type, and it will accept PChar,
PWideChar, interface, and object arguments for the P format type.
In addition, WideFormat can use Int64 and Variant arguments for index, width,
and precision specifiers used by the asterisk character. }