On which os do you work? Do you want that something starts up with your pc trough an edit in the registry made by a batch file?
This you can do by (for winxp):
>>filename.reg ECHO Windows Registry Editor Version 5.00
>>filename.reg ECHO [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
>>filename.reg ECHO "WH"="\"C:\\WINDOWS\\WH.bat\"" (in this example it launchec wh.bat in the windows map)
to launc the reg file
REGEDIT /S filename.reg
