In the section “Creating and executing user-defined functions > Compile and link switches for building dynamically linkable libraries > Windows switches,” the directory name \x64 is changed to \bin64 and Example 3 now reads as:
%VCBASE%\VC\bin\amd64\link /LIBPATH:%VCBASE%\VC\lib\amd64 /LIBPATH:%MSSDK%\lib\bin64 kernel32.lib -manifest -DLL -nologo -MAP:"%OBJ_DIR%\libudfex.map_deco" /OUT:"%OBJ_DIR%\libudfex.dll" "%OBJ_DIR%\my_interpolate.o" "%OBJ_DIR%\my_main.o" /DLL -EXPORT:extfn_use_new_api -EXPORT:my_interpolate