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auxMessage
 
        DWORD auxMessage(uDevice, uMsg, dwUser, dwParam1, dwParam2)
 
        This function is the entry point for an auxiliary audio device
        driver.
 
Parameters
        UINT uDevice
            Specifies the ID of the target device.
 
        UINT uMsg
            Specifies the message being sent to the driver.
 
        DWORD dwUser
            Not used.
 
        DWORD dwParam1
            Specifies a message-dependent parameter.
 
        DWORD dwParam2
            Specifies a message-dependent parameter.
 
Return value
        Unless specified otherwise under a specific message, the driver
        should return an MMSYSERR_ or AUXERR_ error code.
 
Comments
        The driver should return MMSYSERR_NOTSUPPORTED if it does not
        support the specified message.
 
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