[MSDN Library June 1998] WindowProc (35.8974358974359%)

MSDN Library Visual Studio 6.0 > Platform SDK > User Interface Services > Windowing > Window Procedures > Window Procedure Reference > Window Procedure Functions

[MSDN Library April 2000] WindowProc (35.8974358974359%)

MSDN Library - April 2000 > Platform SDK > User Interface Services > Windows User Interface > Windowing > Window Procedures > Window Procedure Reference > Window Procedure Functions

[MSDN Library April 2000] WindowProc (33.0357142857143%)

MSDN Library - April 2000 > Windows CE Documentation > Application Development > API Reference > Core > Functions