MM_WOM_OPEN  NSPPON 

The MM_WOM_OPEN message is sent to a window when the given waveform-audio output device is opened.

MM_WOM_OPEN

wParam = (WPARAM) hOutputDev

lParam = reserved

Parameters

hOutputDev

Handle of the device that was opened.

lParam

Reserved; must be zero.

Return Values

This message does not return a value.