typedef struct {
DWORD dwCallback;
DWORD dwFrom;
DWORD dwTo;
DWORD dwSpeed;
} MCI_ANIM_PLAY_PARMS;
The MCI_ANIM_PLAY_PARMS structure contains parameters for the MCI_PLAY message for animation devices. When assigning data to the members in this structure, set the corresponding MCI flags in the lParam1 parameter of mciSendCommand to validate the members. You can use the MCI_PLAY_PARMS structure in place of MCI_ANIM_PLAY_PARMS if you are not using the extended data members.
MCI_PLAY