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

"Mr. Man-wai Chang" <[email protected]> Fri, 6 Feb 2026 21:06:25 +0800

Newsgroups	alt.comp.os.windows-xp,alt.windows7.general,alt.comp.os.windows-10,alt.msdos.batch.nt
Organization	https://sites.google.com/site/changmw/
Message-ID	<[email protected]>

On 2/6/2026 6:12 PM, R.Wieser wrote:
> 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.
How about a screenshot?? Could it be caused by insufficient length of 
the PATH string? Or maybe the Command Prompt window's width?

dos batch "=C:" - Google Search
https://www.google.com/search?q=dos+batch+%22%3DC%3A%22


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