All details about environment variables and their use in an installer. Format Environment Variables in Windows are denoted with percent signs (%) surrounding the name: %name% echo To display an environment variable's value in cmd.exe , type echo %name% . C:\>echo %USERPROFILE% C:\Users\Daniel set To create/set a variable, use set varname=value : C:\>set FunnyCatPictures=C:\Users\Daniel\Pictures\Funny Cat Pictures C:\>set FunnyCatPicturesTwo=%USERPROFILE%\Pictures\Funny Cat Pictures 2 Environment variables set in this way are available for (the rest of) the duration of the Command Prompt process in which they are set, and are available to processes that are started after the variables were set. setx To create/set a variable permanently , use setx varname "value" : C:\>setx FunnyCatPictures "C:\Users\Daniel\Pictures\Funny Cat Pictures" [Restart CMD] C:\>echo %FunnyCatPicture...
