win_add_dll_directory(+AbsDir)This predicate adds a directory to the search path for dependent DLL
files. If possible, this is achieved with win_add_dll_directory/2.
Otherwise, %PATH% is extended with the provided directory.
AbsDir may be specified in the Prolog canonical syntax. See
prolog_to_os_filename/2.
Note that use_foreign_library/1
passes an absolute path to the DLL if the destination DLL can be located
from the specification using absolute_file_name/3.
This predicate is available from library library(shlib) and
can be autoloaded.