How to manually control focus level of winvideo camera

Hi,

I'm using a USB camera via a image acquisition toolbox.

Is there a way to manually control the focus level of the camera through MATLAB code?

This post doesn't help much in the addressing this problem:

https://www.mathworks.com/matlabcentral/answers/98257-why-am-i-unable-to-use-the-auto-focus-command-to-focus-my-dcam-camera-in-image-acquisition-toolbox-2

Anyone have any idea or further info on how to do this?

Thank you.

This is the imaq info:

dev_info = imaqhwinfo('winvideo',1)

dev_info =

struct with fields:

DefaultFormat: 'RGB24_1280x720'

DeviceFileSupported: 0

DeviceName: 'Integrated Camera'

DeviceID: 1

VideoInputConstructor: 'videoinput('winvideo', 1)'

VideoDeviceConstructor: 'imaq.VideoDevice('winvideo', 1)'

SupportedFormats: {1×27 cell}

The video info:

[Song Decn]

I have same question, can someone help??