For full and parts of batchfiles.

Misc sources:\\
[[http://www.tekweb.dk/manuals/command/INDEX.HTM|Commands index]]\\
[[http://www.evergreen.edu/biophysics/technotes/program/batch.htm|Batch File Commands]]\\
[[http://users.telenor.dk/~dsl645578/batfiles.htm|Batfiles: The DOS batch file programming handbook & tutorial]]\\
[[http://www.computerhope.com/batch.htm|Batch File Help]]\\
[[wp>Batch_file|Batch file]] \\
[[http://www.infionline.net/~wtnewton/batch/batguide.html|Batch Guide by Terry Newton]] \\
[[http://www.robvanderwoude.com/batchfiles.php|Batch files for DOS, OS/2, Windows 95/98, NT 4, 2000 and XP]]

=====Checking for the existence of a specific registry key=====
<code>
rem ### Check for the presence of an ADI SoundMAX HD Audio chip, if detected install the HighDef audio update. ###
reg query "HKLM\SYSTEM\CurrentControlSet\Enum\PCI\VEN_8086&DEV_284B&SUBSYS_100C17AA&REV_02" > nul
IF ERRORLEVEL=1 goto theend
IF NOT ERRORLEVEL=1 goto patch

:theend
exit

:patch
c:\Resource\kb888111xp2en\update\update.exe /passive
</code>

[[http://www.tekweb.dk/manuals/command/COMMANDS/R/REG.HTM|REG.EXE]]

=====Check for the existence of 2 parameters necessary to run a command in batchfile=====
<code>
@echo off
REM If the first value is empty, goto forgot 1.
IF %1.==. goto forgot 1
REM If the fist value is NOT empty, goto next.
IF not %1.==. goto next

:command
REM The actual command to execute that requires 2 parameters.
@echo on
echo Hello %1 %2
@echo off
goto end

:next
REM If the second value is NOT empty goto command.
IF not %2.==. goto command
REM if the second value is empty echo a line and goto end.
IF %2.==. echo You forgot 2
goto end

:forgot 1
echo You forgot 1
goto end

:end
REM The script ends here.
</code>

=====Downloading a jpg image from a TCP/IP-camera=====
<code>
:begin
wget --http-user=username --http-passwd=pwd http://10.0.0.1/Jpeg/CamImg.jpg 
sleep 5
goto begin
</code>

=====Errorlevels of XCOPY=====
^Errorlevel ^Betekenis^
|0 |Files were copied without error |
|1 |No files were found to copy |
|2 |The user pressed CTRL+C to terminate XCOPY |
|4 |Initialization error occurred. There is not enough memory or disk space, or you entered an invalid drive name or invalid syntax on the command-line |
|5 |Disk write error occurred |

Source:[[http://www.tekweb.dk/manuals/command/COMMANDS/X/XCOPY.HTM|XCOPY]]

=====Spawning a program from a batchfile while the batchfile continues=====
<code>
start cmd /c commando
</code>

=====One batchfile for x86 and x64 systems=====
<code>
IF %PROCESSOR_ARCHITECTURE% EQU x86 GOTO X86
IF %PROCESSOR_ARCHITECTURE% EQU AMD64 GOTO X64
GOTO END
</code>