The following code illustrates how to a step a player 10 frames.
USHORT usDeviceID;
MCI_STEP_PARMS mstepp;
/* Step the device 10 frames */
/* Assumes time format for device set to frames */
mstepp.ulStep = (ULONG) 10;
mciSendCommand( usDeviceID, /* Device ID */
MCI_STEP, /* MCI step message */
MCI_WAIT | MCI_STEP_FRAMES,
/* Flags for this message */
(PVOID) &mstepp, /* Data structure */
0); /* No user parm */