typedef struct tagMCI_BREAK_PARMS {
    DWORD_PTR   dwCallback;
#ifdef _WIN32
    int         nVirtKey;
    HWND        hwndBreak;
#else
    short       nVirtKey;
    WORD        wReserved0;             
    HWND        hwndBreak;
    WORD        wReserved1;             
#endif
} MCI_BREAK_PARMS, *PMCI_BREAK_PARMS, FAR * LPMCI_BREAK_PARMS;