typedef struct tagWAVEOUTCAPSA {
    WORD    wMid;                  
    WORD    wPid;                  
    MMVERSION vDriverVersion;      
    CHAR    szPname[MAXPNAMELEN];  
    DWORD   dwFormats;             
    WORD    wChannels;             
    WORD    wReserved1;            
    DWORD   dwSupport;             
} WAVEOUTCAPSA, *PWAVEOUTCAPSA, *NPWAVEOUTCAPSA, *LPWAVEOUTCAPSA;

typedef WAVEOUTCAPSA WAVEOUTCAPS;