Whats the %=C:% environment variable used for ?

"R.Wieser" <[email protected]> Fri, 6 Feb 2026 11:12:42 +0100

Newsgroups	alt.comp.os.windows-xp,alt.windows7.general,alt.comp.os.windows-10
Organization	A noiseless patient Spider
Message-ID	<[email protected]>

Hello all,

A couple of days ago I was looking at the envronment variables, and noticed 
a variable named "=C:", containing the current path of that drive.

Can anyone tell me what it was/is used for ?


Remarks: Using the command-prompt it doesn't appear in the "set" list, and 
it can be read, but not written.

Regards,
Rudy Wieser