I worked at Microsoft Excel 15 years ago and Visual Studio was only used as a debugger. Visual SlickEdit was the editor and compiling/building was command-line based. Each group is different.
Ah, that may be true. However, there was a push within my division to standardize all of our tools with VS (there used to be a separate editor for X++ but now it's all VS), and I've heard other things about other divisions.