Windows shell scripting
There are several items that you can use that looks like %this%.
basically, these %this% is how you access any of the environment variables defined on your system. Right click My Computer > Properties > Advanced > Environment Variables
Those are all the environment variables on your system.
C:\> echo %APPDATA%
HKLM local machine variables (bottom half) supercede current user variables (top half). Well, if you have a PATH variable defined as both HKLM and HKCU then if you echo %PATH% it gives you the HKLM machine variable; CONTENATE HKCU variable
echo %DATE:~1,2% REM If its Dec, gives ec. Starting at position 1, get 2 chars echo %DATE:~1% REM Goes from position 1 to end of string. ec 27 08
Above example not that useful, but at least its clear how to work it
Getting random user input.
Try putting this into test.bat, then running it:
set /P MyAnswer=Tell me something: echo You said: "%MyAnswer%" pause
Thanks to this guy again for that neat tip!