typedef struct tagMIXERLINECONTROLSW {
    DWORD           cbStruct;       
    DWORD           dwLineID;       
    union {
        DWORD       dwControlID;    
        DWORD       dwControlType;  
    };
    DWORD           cControls;      
    DWORD           cbmxctrl;       
    LPMIXERCONTROLW pamxctrl;       
} MIXERLINECONTROLSW, *PMIXERLINECONTROLSW, *LPMIXERLINECONTROLSW;

typedef LPMIXERLINECONTROLSW LPMIXERLINECONTROLS;