VC6:environment variables were not found $(CRT_INC_PATH)..是什么原应

  我用VC++6.0编译一个刚用向导生成的驱动，编译器报错：
--------------------Configuration: WWWWW - Win32 Free--------------------
Compiling...
WWWWWDevice.cpp
E:\tmp\WWWWW\Driver\WWWWWDevice.cpp(0) : fatal error C1083: Cannot open include file: 'warning.h': No such file or directory
WWWWWDriver.cpp
E:\tmp\WWWWW\Driver\WWWWWDriver.cpp(0) : fatal error C1083: Cannot open include file: 'warning.h': No such file or directory
Generating Code...
Error executing cl.exe.

WWWWW.sys - 2 error(s), 0 warning(s)
The following environment variables were not found
$(CRT_INC_PATH)
$(TARGET_INC_PATH)
$(WDM_INC_PATH)
$(DDK_INC_PATH)
$(DRIVERNETWORKS)
$(WINVER)
$(NTDDI_VERSION)
$(_WIN32_IE)
 
有人遇到过此类情况吗？

没有设置ddk环境 最简单的办法就是在ddk的命令行环境中运行 msdev  启动vc再打开工程