[MSDN Library June 1998] GetClassLong (52.7394636015326%)
MSDN Library Visual Studio 6.0 > Platform SDK > User Interface Services > Windowing > Window Classes > Window Class Reference > Window Class Functions
[MSDN Library April 2000] GetClassLong (52.7394636015326%)
MSDN Library - April 2000 > Platform SDK > User Interface Services > Windows User Interface > Windowing > Window Classes > Window Class Reference > Window Class Functions
[MSDN Library April 2000] GetClassLong (42.7011494252874%)
MSDN Library - April 2000 > Windows CE Documentation > Application Development > API Reference > User Interface > Functions