typedef struct tagMCI_WAVE_OPEN_PARMSA {
    DWORD_PTR   dwCallback;
    MCIDEVICEID wDeviceID;
    LPCSTR      lpstrDeviceType;
    LPCSTR      lpstrElementName;
    LPCSTR      lpstrAlias;
    DWORD   dwBufferSeconds;
} MCI_WAVE_OPEN_PARMSA, *PMCI_WAVE_OPEN_PARMSA, *LPMCI_WAVE_OPEN_PARMSA;

typedef LPMCI_WAVE_OPEN_PARMSA LPMCI_WAVE_OPEN_PARMS;