[p4] Backup procedure help required - script for Perforce in Windows (DOS/VBS)?

[Eric L]

Hello, I am a new Perforce user.

Does anyone have an automated backup script for Perforce running on
Windows, which they could share?

Also, I do not understand what this step in the Perforce backup procedure means:

"3. Ensure that the checkpoint has been created successfully before
backing up any  files. (After a disk crash, the last thing you want to
discover is that the  checkpoints you've been backing up for the past
three weeks were incomplete!)

 You can tell that the checkpoint command has completed successfully
by  examining the error code returned from p4d -jc, or by observing
the  truncation of the current journal file."

A. How do I examine the error code, and what do I look for?
B. What am I supposed to observe about the truncation of the current
journal file?

Thanks in advance,
Eric