typedef struct wavehdr_tag {
    LPSTR       lpData;                 
    DWORD       dwBufferLength;         
    DWORD       dwBytesRecorded;        
    DWORD_PTR   dwUser;                 
    DWORD       dwFlags;                
    DWORD       dwLoops;                
    struct wavehdr_tag FAR *lpNext;     
    DWORD_PTR   reserved;               
} WAVEHDR, *PWAVEHDR, NEAR *NPWAVEHDR, FAR *LPWAVEHDR;