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The MM_MIM_OPEN message is sent to a window when a MIDI input device is opened.
MM_MIM_OPEN
wParam = (WPARAM) hInput
lParam = reserved
Parameters
hInput
Handle to the MIDI input device that was opened.
lParam
Reserved; do not use.
Return Values
This message does not return a value.
Requirements
** Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
** Windows 95/98/Me:** Included in Windows 95 and later.
** Header:** Declared in Mmsystem.h; include Windows.h.
See Also