Tutorial on Batch files and scripting

[Ferland <f3rland () gmail com>]

Anyone know any good tutorial on Batch files?
I need to create .bat files (to use with the cmd.exe shell) that
automate task on a Windows XP OS like :
  - Keep a log of a registry keys (and compare backup file with the
new one to see if there is changes...)  ex: REG QUERY
HKLM\Software\Microsoft\ResKit /v Version >> RegistryResKiT.log
  - Keep a log of current connections

And advanced batch scripting could be usefull for that job.

Thanks
Ferland