MCI_ANIM_STEP_PARMS

See also MCI_STEP

typedef struct {
    DWORD  dwCallback;
    DWORD  dwFrames;
} MCI_ANIM_STEP_PARMS;

The MCI_ANIM_STEP_PARMS structure contains parameters for the MCI_STEP message for animation devices. When assigning data the members in this structure, set the corresponding MCI flags in the lParam1 parameter of mciSendCommand to validate the members.

dwCallback

The low-order word specifies a window handle used for the MCI_NOTIFY flag.

dwFrames

Specifies the number of frames to step.