- Use %lu instead of %lx for printf-ing last-errors; - Don't call GetLastError() within ok, or after a previous invocation, when the aim is to retrieve the last-error set by a tested API. Instead, store its value in a local variable, that is then used in the ok() tests. - Use win_skip() only for functionality that _may_ not be implemented in Windows/ReactOS yet, but not for unexpected situations leading to tests being skipped. - Add comments; improve buffer size specifications. - Reformat the file license header.