Maybe for Windows (but then again, PASCAL was the supported language for the Apple Mac in the same timeframe), but MS had both PASCAL and C compilers for DOS. (And of course BASIC compilers, plus whatever weird stuff their Fox Pro thing was about. No it was not a hypertext browser, just some weird programming system that I can't find more info about.) The early Windows 16-bit ABI was rather influenced by PASCAL conventions, which introduced some awkwardness when trying to code to it from C.