Microsoft Corp. President Brad Smith raised concerns to U.S. lawmakers about what the company regards as Apple Inc.’s anti-competitive behavior around its app store,and he said last month that regulators should examine app store rules because developers may be forced unfairly to provide a share of app store revenue to the company. (Apple usually take 30 off in app purchases)The House Judiciary Antitrust Subcommittee will hold a hearing with the CEOs of Apple, Amazon.com Inc., Facebook Inc. and Google-parent Alphabet Inc. on July 27. A Microsoft spokesperson declined to comment Monday. source