The MCI_ANIM_UPDATE_PARMS structure contains parameters for the MCI_UPDATE message for animation devices. When assigning data to the fields in this data structure, set the corresponding MCI flags in the lParam1 parameter of mciSendCommand to validate the fields.
typedef struct {
DWORD dwCallback;
RECT rc;
HDC hDC;
} MCI_ANIM_UPDATE_PARMS;
The MCI_ANIM_UPDATE_PARMS structure has the following fields:
dwCallback
The low-order word specifies a window handle used for the MCI_NOTIFY flag.
rc
Specifies a window rectangle.
hDC
Specifies a handle to the device context.