typedef struct tagMCI_ANIM_PLAY_PARMS {
    DWORD_PTR   dwCallback;
    DWORD       dwFrom;
    DWORD       dwTo;
    DWORD       dwSpeed;
} MCI_ANIM_PLAY_PARMS, *PMCI_ANIM_PLAY_PARMS, FAR *LPMCI_ANIM_PLAY_PARMS;