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MCI_OPEN_DRIVER_PARMS
 
        The MCI_OPEN_DRIVER_PARMS structure contains data for the DRV_OPEN
        message.
 
        typedef struct {
            UINT   wDeviceID;<R>
            LPCSTR  lpstrParams;<R>
            UINT  wCustomCommandTable;<R>
            UINT  wType;<R>
        } MCI_OPEN_DRIVER_PARMS;
 
Fields
        The MCI_OPEN_DRIVER_PARMS structure has the following fields:
 
        wDeviceID
            Specifies the MCI device ID.
 
        lpstrParams
            Specifies a long pointer to the entry parameter string obtained
            from the SYSTEM.INI file.
 
        wCustomCommandTable
            Specifies a handle to a custom command table for the MCI
            driver. Set to -1 if the device driver does not have a custom
            command table.
 
        wType
            Specifies the type of device driver:
 
            MCI_DEVTYPE_ANIMATION
                Specifies an animation device type.
 
            MCI_DEVTYPE_CD_AUDIO
                Specifies a cdaudio device type.
 
            MCI_DEVTYPE_DAT
                Specifies a digital audiotape device type.
 
            MCI_DEVTYPE_DIGITAL_VIDEO
                Specifies a digital video device type that is not GDI based.
 
            MCI_DEVTYPE_OTHER
                Specifies a device type not covered by other device types.
 
            MCI_DEVTYPE_OVERLAY
                Specifies a video overlay device type.
 
            MCI_DEVTYPE_SEQUENCER
                Specifies a sequencer device type.
 
            MCI_DEVTYPE_SCANNER
                Specifies a scanner device type.
 
            MCI_DEVTYPE_VCR
                Specifies a videotape device type.
 
            MCI_DEVTYPE_VIDEODISC
                Specifies a videodisc device type.
 
            MCI_DEVTYPE_WAVEFORM_AUDIO
                Specifies a waveaudio device type.
 
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