[MSDN Library April 2000] MM_WIM_OPEN (84.375%)
MSDN Library - April 2000 > Platform SDK > Graphics and Multimedia Services > Windows Multimedia > Multimedia Reference > Multimedia Messages
[MSDN Library September 1992] MM_WIM_OPEN (38.6830357142857%)
Product Documentation > Multimedia Development Kit > Programmer's Reference > Chapter 5 Message Directory > Message Descriptions