GetMenuStringA method
Implementation
int GetMenuStringA(
  ffi.Pointer<HMENU__> hMenu,
  int uIDItem,
  ffi.Pointer<ffi.Int8> lpString,
  int cchMax,
  int flags,
) {
  return (_GetMenuStringA ??=
      _dylib.lookupFunction<_c_GetMenuStringA, _dart_GetMenuStringA>(
          'GetMenuStringA'))(
    hMenu,
    uIDItem,
    lpString,
    cchMax,
    flags,
  );
}