Windows Multimedia DDK (mddkqh.hlp) (Table of Contents; Topic list)
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MIDM_GETNUMDEVS
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MIDM_GETNUMDEVS
 
        This message is sent to a MIDI input device driver to request
        the number of MIDI input devices available.
 
Parameters
        DWORD dwParam1
            Unused.
 
        DWORD dwParam2
            Unused.
 
Return value
        Returns the number of input devices the driver supports.
 
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