The following example shows how to set the frequency for the tuner device using MCI_SETTUNER.

USHORT               usDeviceID;
MCI_DGV_TUNER_PARMS  settuner;

settuner.usDeviceID  = usDeviceID; /* Device ID */
settuner.ulFrequency = 24725; /* Frequency for channel 29 in USA Cable TV */
settuner.pszRegion   = NULL;  /* Region, Channel and Finetune are not */
settuner.usTVChannel = 0;     /* needed since we are inputting the    */   */
settuner.lFineTune   = 0;     /* frequency.                           */   */


ulError = mciSendCommand ( usDeviceID,
                           MCI_SETTUNER,
                           MCI_WAIT | MCI_DGV_FREQUENCY,
                           &settuner,
                           0);