[MSDN Library June 1998] IsWindowUnicode (39.2942583732057%)
MSDN Library Visual Studio 6.0 > Platform SDK > User Interface Services > Windowing > Windows > Window Reference > Window Functions
[MSDN Library April 2000] IsWindowUnicode (39.2942583732057%)
MSDN Library - April 2000 > Platform SDK > User Interface Services > Windows User Interface > Windowing > Windows > Window Reference > Window Functions