How can I get Domain Name in the INstallscript?

[mayurbirari]

I want to add 2 domain users to the local adminstrator's group, for that first I have to get the domain name.
In the batch file it is very easy, if we type %USERDOMAIN% then we get the domain name. Does anybody have idea, how can I get it in installscript?

Thanks,
Mayur.

[RobertDickau]

Call GetEnvVar from InstallScript, perhaps?