#include "ltmm.h"

C Syntax

HRESULT IltmmTVTuner_AutoTune(pTV, Channel, pVal)

C++ Syntax

HRESULT AutoTune(Channel, pVal)

IltmmTVTuner *pTV;

pointer to an interface

long Channel;


long *pVal;

pointer to a variable

Fine tunes the specified channel by scanning for the most precise signal for that channel.




Pointer to an IltmmTVTuner interface.


Number of the channel to "fine tune".


Pointer to a variable to be updated with a value that indicates whether the signal was found. A nonzero value indicates the signal was found. Zero indicates the signal was not found.



The function was successful.

<> S_OK

An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.


This function maps the TV channel to a frequency and searches for the most precise frequency for this channel, in the area. Calling this function for every channel in a region or country allows you to create a table of channel and frequency information. Once all channels in the region or country have been scanned, use IltmmTVTuner::StoreAutoTune to save the channel information.

For more detailed information, refer to the Microsoft documentation for IAMTVTuner::AutoTune.

Required DLLs and Libraries


For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.


Win32, x64

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