For the quarter that ended March 31:
Microsoft, $5.11 billion [1]
Apple, $11.6 billion [2]
For the quarter that ended June 30:
Microsoft, $0.19 billion [3]
Apple, $8.8 billion [4]
[1] http://www.microsoft.com/en-us/news/press/2012/apr12/04-19fy...
[2] http://www.apple.com/pr/library/2012/04/24Apple-Reports-Seco...
[3] http://www.microsoft.com/investor/EarningsAndFinancials/Earn...
[4] http://www.apple.com/pr/library/2012/07/24Apple-Reports-Thir...