title: strncpy and _tcsncpy c++ example
body: <p>I couldn't find any clear source in google, so I decided ask here.</p>
  
  <p>Functions strncpy and _tcsncpy in c++ accept 3 arguments: destination, source and nCount.</p>
  
  <p>It is not clear for me what is 3rd parameter nCount. Is it amount of characters to be copied or size of buffer in bytes?</p>