[MSDN Library June 1998] MM_MOM_OPEN (38.6830357142857%)
MSDN Library Visual Studio 6.0 > Platform SDK > Graphics and Multimedia Services > Multimedia Reference > Multimedia Messages
[MSDN Library April 2000] MM_MOM_OPEN (35.487012987013%)
MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > Windows Multimedia > Multimedia Reference > Multimedia Messages