2020-06-23 23:03 AEST by Arthur Barrett - Tested with CVS Suite 2009-7480 on windows client, when using :ssh: TCVS prefers it's own passwd dialog 
over cvsagent

Reports this as 'env':

In C:\Users\scott\AppData\Local\Temp\TCV3c83.tmp: "C:\Program Files (x86)\CVS 
Suite\CVSNT\cvs.exe" -q checkout -r 1.25 -d temp userdlls/nscustomers/Class1.cs
CVSROOT=:ssh:abarrett@cvs.march-hare.com:/scotty

SSH server authentication
Password:  ********* (<-- from env)
SSH server authentication
U temp/Class1.cs

Success, CVS operation completed



Note: when cvs is ran from command line, it works with cvsagent, which reports 'registry' as the source of the 
passwd...
 

C:\Users\scott\Documents\Visual Studio 2010\nscustomers>
>cvs ver
SSH server authentication
Password:  ********* (<-- from registry)
SSH server authentication
Client: Concurrent Versions System (CVSNT) 2.8.01 (Soolin) Build 7480 (client/se
rver)
Server: Concurrent Versions System (CVSNT) 2.8.02 (Cally) Build 5590RC 7 (client
/server)