By Bret Kenwell Microsoft stock already gave us a great buying opportunity this month. Will it give another? When Microsoft (MSFT) – Get Microsoft Corporation Report reports its quarterly results on Tuesday after the close, it will be the largest company to report earnings so far this quarter. That holds until Apple (AAPL) – Get Apple Inc. Report reports later this week. Still, as the second-largest U.S. company, Microsoft carries quite a bit of weight on Wall Street. The software giant dominates on multiple levels of enterprise and consumer spending. It generates better operating margins than…