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WODM_GETPLAYBACKRATE
 
        This message is sent to a waveform output device driver to
        request the current playback rate setting for a device.
 
Parameters
        DWORD dwParam1
            Specifies a far pointer to a DWORD location. The driver
            fills this location with the current playback rate setting. The
            rate is specified as a fixed-point value. The high-order word
            of the DWORD contains the signed integer part of the number,
            and the low-order word contains the fractional part. The
            fraction is expressed as a WORD in which a value of 0x8000
            represents one-half, and 0x4000 represents one-quarter. For
            example, the value 0x00010000 specifies a multiplier of 1.0
            (no pitch change), and a value of 0x000F8000 specifies a
            multiplier of 15.5.
 
        DWORD dwParam2
            Unused.
 
Return value
        The return value is an error code, or zero (MMSYSERR_NOERROR) if
        the operation is successful. Possible error codes are:
 
        MMSYSERR_NOTENABLED
            The driver failed to load or initialize.
 
        MMSYSERR_NOTSUPPORTED
            The driver does not support changes to the pitch rate.
 
Comments
        Driver support for playback rate changes is optional. However,
        if a driver supports changes to the playback rate with the
        WODM_SETPLAYBACKRATE message, it must support queries with the
        WODM_GETPLAYBACKRATE message.
 
See also
        WODM_SETPLAYBACKRATE
 
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