I need to launch a dialog like the one you get by
right-clicking the time on the taskbar and selecting
"adjust date/time"

Having the user click the the taskbar date/time is not
acceptable for this application

It would be ok to simply launch the taskbar version
for them

I believe that the taskbar date/time launches a DLL ( via rundll32.exe )
but I don't know which one

The command line to do what you want is:

trailing "0" is the number of the page to select.  If you change it to
"1" in this example, you will get the timezone page instead of the
time/date page.

--
J.T. Anderson
PLATINUM technology, Los Angeles Laboratory

Works great, however, there's an oops on my part
Unless I can figure out how to make this work
like a modal dialog, I can't use it.
I can't have it disappearing behind the main app
I have experimented the time zone functions and have
figured out how to get a list of time zones, and to set
them in the registry ( the SetTimeZoneInformation doesn't
seem to set the registry properly )

There has got to be a better way though.
Does anybody know the proper way to set the time zone information