Windows batch scripting

Windows NT 4.0 introduced several extensions to cmd.exe. Use these extensions to ensure that the HKEY_CURRENT_USER\Software\Microsoft\Command Processor\EnableExtensions registry entry is set to 1. The following table lists the most commonly used commands.

call <batch file>	Calls one batch file from inside another. The current batch file's execution is suspended until the called batch file completes.
exit	Stops a batch file from running. If one batch file calls another, exit stops both batch files.
findstr <string> <filename(s)>	Finds a string in a file. This powerful command has several parameters.
for	Standard for loop. The command for /L %n IN (1,1,10) DO @ECHO %n Would print 1 to 10.
goto <label>	Causes a program's execution to skip to a given point. A colon must precede the label name. For example, goto label1 ... :label1 ...
if <condition> ..	The if statement has a lot of functionality. Common uses include the following. if /i <string1> <compare> <string2> <command> The /i parameter makes the comparison case-insensitive. The comparison can be one of the following. EQU—equal NEQ—not equal LSS—less than LEQ—less than or equal GTR—greater than GEQ—greater than or equal if errorlevel if exist <file name>
rem <string>	A comment.
start <window title> <command>	Starts a new command session and runs a given command. Unlike with the call command, the current batch file's execution continues.

The Microsoft Windows NT Resource Kit includes some additional utilities that you might find useful.