This excerpt taken from the MSFT 10-K filed Jul 30, 2009.
Certain forecasted transactions, assets, and liabilities are exposed to foreign currency risk. We monitor our foreign currency exposures daily to maximize the economic effectiveness of our foreign currency hedge positions. Options and forward contracts are used to hedge a portion of forecasted international revenue for up to three years in the future and are designated as cash-flow hedging instruments. Principal currencies hedged include the euro, Japanese yen, British pound, and Canadian dollar. As of June 30, 2009, the total notional amount of such foreign exchange contracts was $7.2 billion. Foreign currency risks related to certain non-U.S. dollar denominated securities are hedged using foreign exchange forward contracts that are designated as fair-value hedging instruments. As of June 30, 2009, the total notional amount of these foreign exchange contracts sold was $3.5 billion. Certain options and forwards not designated as hedging instruments are also used to manage the variability in exchange rates on accounts receivable, cash, and intercompany positions, and to manage other foreign currency exposures. As of June 30, 2009, the total notional amounts of these foreign exchange contracts purchased and sold were $3.2 billion and $3.6 billion, respectively.