What countries participate in the Commonwealth Games?

Countries in the commonwealth?  What are the commonwealth countries?  How many countries are in commonwealth?  Who takes part in the commonwealth games?  What countries belong to the commonwealth?  What countries make up the commonwealth region?  How many countries are part of the commonwealth?  Which countries compete in the commonwealth games?  How many countrys participate in the olmpic games?  What countries make up the commonwealth of nations?  What countries participate in the commenweath games?  How many countries take part in the commonwealth games?  About how many countries participatein the olmpic games?  How many categories are there in Commonwealth Games 2014?  What are the countries involved in the commonwealth games?  Which group of countries compete in the commonwealth games?  Names of countries that participated in the commonwealth games?  What are the commonwelth games and what are the countries in them?  What countries are participatingin the commonwealth of nations games?