typedef struct tagMIXERCAPSA {
    WORD            wMid;                   
    WORD            wPid;                   
    MMVERSION       vDriverVersion;         
    CHAR            szPname[MAXPNAMELEN];   
    DWORD           fdwSupport;             
    DWORD           cDestinations;          
} MIXERCAPSA, *PMIXERCAPSA, *LPMIXERCAPSA;

typedef LPMIXERCAPSA LPMIXERCAPS;