The common rule here is that empty or blank values will produce 0.0.0.0
(as well as "0.0.0.0" itself).

  CountryID        - 
  CountryName      - 
  CountryCode      - 
  AreaCode         - 

(Country ID-Name-Code and AreaCode are described in the
C<TAPIlineGetTranslateCaps()> section except that here they are describing
the computer you want to dial to.)

In C<RasSetEntryProperties()>
C<CountryName> would be ignored. C<CountryID> not matching C<CountryCode>
would give error. You could easily give only one of these two values. C<CountryCode>
would be counted properly if C<CountryID> is given (described in
C<TAPIlineGetTranslateCaps()> section). But if you'll give C<CountryCode>
C<CountryID> would be set equal to C<CountryCode> that is sometimes incorrect
but does not affect the dialup connection.