title: convert Windows SYSTEMTIME to a string or char buf in C++ with user's "Region and Language" format?
body: <p>How does my C++ program convert a SYSTEMTIME in the user's preferred "long date format" either as defaulted from their Language setting, or as custom-set on the Control Panel->Region and Language dialog?</p>
  
  <p>If it matters I'm on Visual Studio 2017 and primarily looking for C/C++03 type solutions but if there's a solution for newer C++ I wouldn't mind seeing it.</p>