DOS command variable question

[Tangent]

I've got a few batch files that I use at work that copy several files from a server to a Windows 2000 c:\winnt directory. What I want to do is make those work with Windows XP as well and copy to the c:\windows directory when needed. I know that at the run command if you browse to a workstation you can enter \\workstation name\admin$ and it'll open the winnt or windows directory depending on what the admin share happens to be on that workstation. What's the equivalent of the "admin$" for my batch files?

 

[Tangent]

Nevermind I found it: %windir%

 

[Whatsisname]

thats not dos, thats the command prompt. The two are very different.