- 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.