How to get .lnk file info

[nini22P]

I searched and found that there is a ShellLink class, but I don't know how to use it.

[nini22P]

    String? path;
    String? description;

    final shellLink = ShellLink.createInstance();
    final persistFile = IPersistFile.from(shellLink);

    final lpPath = wsalloc(MAX_PATH + 1);
    final lpDescription = wsalloc(MAX_PATH + 1);

    if (persistFile.load(shortcutPath.toNativeUtf16(), 0) == 0) {
      if (shellLink.getPath(lpPath, MAX_PATH + 1, nullptr, MAX_PATH + 1) == 0) {
        path = lpPath.toDartString();
      }

      if (shellLink.getDescription(lpDescription, MAX_PATH + 1) == 0) {
        description = lpDescription.toDartString();
      }
    }

    print('path: $path, description: $description');

    free(lpPath);
    free(lpDescription);

[pharan]

Can someone help me with how to convert the strings between UTF16 and Dart strings?

Those are parts of the code that aren't referencing anything in the libraries. I also tried to search for an answer and couldn't find any.

EDIT 2:
I also don't understand why we're passing MAX_PATH + 1 and twice to getPath.
Isn't the last argument supposed to be a format flag? https://learn.microsoft.com/en-us/windows/win32/api/shobjidl_core/nf-shobjidl_core-ishelllinka-getpath

EDIT:
nullptr is from 'dart:ffi'