[MSDN Library April 2000] FM_GETSELCOUNTLFN (48.3780560524746%)
MSDN Library - April 2000 > Platform SDK > User Interface Services > Windows Shell > Shell Reference > Shell Messages and Notifications
[MSDN Library June 1998] FM_GETSELCOUNTLFN (47.117226139114%)
MSDN Library Visual Studio 6.0 > Platform SDK > User Interface Services > Shell and Common Controls > Windows Shell API > Shell Reference > Messages