devenv.exe starts the IDE of Visual Studio and allows to control it from the command line (cmd.exe). vswhere.exe in PowerShell: PS C:\> & 'C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe' -property productPath
VsDevCmd.bat, the name of the directory that contains devenv.exe is stored in the Visual Studio environment variable %DevEnvDir%. C:\…> devenv tq84.sln /Build C:\…> devenv tq84.sln /Build proj C:\…> devenv tq84.sln /Build /Debug proj
/diff flag, devenv.exe compares two files: C:\…> devenv /diff file1.cs file2.cs