The graphical Microsoft® Windows NT® DDK Setup program creates a program group called Windows NT Device Driver Kit. Among other items, this program group contains items called Free Build Environment and Checked Build Environment. These items call setenv.bat to create a build environment with correct environment variables.
Manual installation does not create this program group. You can call setenv.bat manually, using the following syntax:
setenv <destination> [free | checked]
The <destination> argument specifies the directory where the DDK was installed. The optional second argument specifies the target build environment; the default type is free.