This message notifies an application that the device has encountered a cue point in a playlist, or that a cue point has been set with MCI_SET_CUEPOINT.

MsgParam1
     USHORT  usUserParameter  /*  User-specified parameter. */
     USHORT  usDeviceID       /*  Device ID. */

MsgParam2
     ULONG   ulMMtime         /*  Media position. */