typedef struct tagWAVEOUTCAPSW {
    WORD    wMid;                  
    WORD    wPid;                  
    MMVERSION vDriverVersion;      
    WCHAR   szPname[MAXPNAMELEN];  
    DWORD   dwFormats;             
    WORD    wChannels;             
    WORD    wReserved1;            
    DWORD   dwSupport;             
} WAVEOUTCAPSW, *PWAVEOUTCAPSW, *NPWAVEOUTCAPSW, *LPWAVEOUTCAPSW;

typedef LPWAVEOUTCAPSW LPWAVEOUTCAPS;