How to get system drive?

Hi all,

I have to parse the result of a DOS command, and I need that that DOS command is executed on the system drive.
For example if the system drive is "C:\" it must be executed in "C:\" and not "D:\" or "X:\" or what else.
So is there a way to get the system drive?

By the way: if there is an easier way to get the system drive volume serial number, it would be great if he could tell it :)

Thank you in advance!

I think there is some environment variable on windows that keeps the system directory. You can extract the drive from there.

Quote:

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Originally Posted by wysota

I think there is some environment variable on windows that keeps the system directory. You can extract the drive from there.

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In fact "windir" will do what I need, thanks again S.Wysota :)