setFileNameLabel method
Implementation
int setFileNameLabel(Pointer<Utf16> pszLabel) =>
    (ptr.ref.vtable + 19)
        .cast<
          Pointer<
            NativeFunction<Int32 Function(Pointer, Pointer<Utf16> pszLabel)>
          >
        >()
        .value
        .asFunction<int Function(Pointer, Pointer<Utf16> pszLabel)>()(
      ptr.ref.lpVtbl,
      pszLabel,
    );