[Bug 19839] Access violation when closing ImgBurn 2.5.0.0 if its 'Disc Layout Editor' window has ever been opened.

http://bugs.winehq.org/show_bug.cgi?id=19839

--- Comment #11 from LIGHTNING UK!   2009-08-26 04:51:10 ---
Oops, seems that if size is 0, windows actually returns the number of
characters that *would* be copied into the buffer *if* there was sufficient
allocation.

So this should work?

len = strlenW (infoPtr->parts[0].text);

if(size == 0)
    {
      return len;
    }
    else if(size > len)
    {
      strcpyW (buf, infoPtr->parts[0].text);
      return len;
    }
    else
    {
      memcpy (buf, infoPtr->parts[0].text, (size - 1) * sizeof(WCHAR));
      buf[size - 1] = 0; // This has to be 'size - 1' rather than just 'size'
or you'll get an access overrun?
      return size - 1;
    }