How to use Win2000 DDK?

[Noya]

I am a newcomer. After installing VC6.0, I set up Win2000DDK to compile and link an example program(*.sys). Then the following error comes out.
--------------------------------
Deleting intermediate files and output files for project 'board - Win32 2K Debug'.
--------------------Configuration: board - Win32 2K Debug--------------------
Compiling WMI Schema...
ϵͳÕÒ²»µ½Ö¸¶¨µÄ·¾¶¡£
ϵͳÕÒ²»µ½Ö¸¶¨µÄ·¾¶¡£
Error executing c:\winnt\system32\cmd.exe.

board.sys - 1 error(s), 0 warning(s)
The following environment variables were not found
$(DDKPATH)
---------------------------------
Please help me solve this problem in detail.
Thank you.

[vicodin451]

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=uFkHn8%24pAHA.1224%40tkmsftngp04&rnum=2&prev=/groups%3Fsourceid%3Dnavclient%26ie%3DUTF-8%26oe%3DUTF-8%26q%3DDDKPATH