Consider the following list of countries which I would like to highlight on a world map:
MyCountries={"Germany","Hungary","Mexico","Austria","Bosnia","Turkey","SouthKorea","China"};
From the documentation center (Country Data > Applications > Application 5), I know that
Graphics[{If[CountryData[#, "AntarcticNations"], Orange, LightBrown],
CountryData[#, "SchematicPolygon"]} & /@ CountryData[]]
works for all antarctic nations. I replaced "AntarcticNations"
by MyCountries
but it does not seem to work.