This structure contains fields for the MCI_WINDOW message for video overlay devices. This structure is the same as MCI_VID_WINDOW_PARMS. When assigning data to the fields in this data structure, set the corresponding Media Control Interface flags in the ulParam1 parameter of mciSendCommand to validate the fields.
typedef MCI_VID_WINDOW_PARMS MCI_OVLY_WINDOW_PARMS;