Launching TimeDate.cpl

[Robert Misiak]

In a program that I wrote, it is very important for the user to have the
correct time zone configured. As such, in its properties window I display
the current configured time zone, and if it is incorrect there is a button
that the user can click on which launches TimeDate.cpl. This is how I run
it:

System.Diagnostics.Process.Start ("rundll32.exe",
"shell32.dll,Control_RunDLL TimeDate.cpl");

This works just fine in debug mode from the VS.NET development environment;
however, when I compile and install a release version, TimeDate.cpl displays
a MessageBox with this message:

"You do not have the proper privilege level to change the System Time."

The user account does have that authority, as it is the same one I was able
to run TimeDate.cpl via the VS.NET devenv. Any ideas of how to get around
this?

Thanks,
Robert

 

[Robert Misiak]

Alternatively, is it possible for me to programmatically change the time
zone without launching TimeDate.cpl? I did some searching around on the web
and didn't find much information about this.

Thanks,
Robert

 

[Mattias Sjögren]

Robert,

Alternatively, is it possible for me to programmatically change the time
zone without launching TimeDate.cpl?

http://msdn.microsoft.com/library/en-us/sysinfo/base/settimezoneinformation.asp

Declaration available at http://www.pinvoke.net



Mattias

 

[Robert Misiak]

Thanks, Mattias. I've actually been up all night working and was able to
implement it. The biggest confusion was that the TZI registry value is a
44-byte TIME_ZONE_INFORMATION struct, but SetTimeZoneInformation() wanted a
larger version of the struct with the two strings for the the zone ST and
DST names.

Best,
Robert

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