Use the DDK_LIB_PATH environment variable to specify the path to the Windows DDK libraries.
DDK_LIB_PATH should contain an asterisk ( * ). When the Build utility looks for libraries, it will replace the asterisk with the target platform type — i386 for an x86 processor, ia64 for an Itanium-based processor, or amd64 for an AMD x86-64 processor.
The default is:
%DDKROOT%\lib\Version\*
For this default value, %DDKROOT% is the root installation directory of the DDK. Version indicates the version of Windows supported by the build environment — w2k for Windows 2000, wxp for Windows XP, or wnet for Windows Server 2003.