XP Question: Extended monitor is primary; don't want that!

My XP laptop has an extended monitor attached. All of a sudden, the extended monitor has the task bar and all of the icons. I don’t know how this happened, but, I sure would like it fixed.
Can anyone help?

thanks,
hh

Have you tried this?

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/display_multi_monitors_select_primary.mspx?mfr=true

That did it!

Thanks,
hh

Happy to help.