This library is only available on Windows systems.
| registry_get_key/2 | Get principal value of key |
| registry_get_key/3 | Get associated value of key |
| registry_set_key/2 | Set principal value of key |
| registry_set_key/3 | Set associated value of key |
| registry_delete_key/1 | Remove a key |
| shell_register_file_type/4 | Register a file-type |
| shell_register_dde/6 | Register DDE action |
| shell_register_prolog/1 | Register Prolog |