SWI-Prolog -- win

Documentation
- Reference manual
  - Built-in Predicates
    - Operating System Interaction
      - Windows-specific Operating System Interaction
        
        win_exec/2
        
        win_shell/3
        
        win_shell/2
        
        win_registry_get_value/3
        
        win_folder/2
        
        win_add_dll_directory/1
        
        win_add_dll_directory/2
        
        win_remove_dll_directory/1
- Packages

win_folder(?Name, -Directory)

True if Name is the Windows‘CSIDL' of Directory. If Name is unbound, all known Windows special paths are generated. Name is the CSIDL after deleting the leading CSIDL_ and mapping the constant to lowercase. Check the Windows documentation for the function SHGetSpecialFolderPath() for a description of the defined constants. This example extracts the‘My Documents' folder:

?- win_folder(personal, MyDocuments).

MyDocuments = 'C:/Documents and Settings/jan/My Documents'