Help with WCHAR and Locales

I have an intermediate NDIS driver. I’ve modified the snetcfg.exe
Installer that is part of the 2K DDK to install my filter driver as a
service. It appears to be working correctly. However, people from
different countries may be using this installer.exe on the OS and I am
worried that the installer.exe may not work correctly.

Can someone tell me if my worries are justified?

Can someone tell me why the snetcfg.exe installer in the DDK uses WCHAR
and functions which take WCHAR types?

Is this done so that it will work on other languages of the OSs?

Thanks,
Angel