Windows 10: How to detect the on / off time of the built-in camera and the process name of using it?

I used a method to get the process name who is using camera, it can run normal in Win10 OS 1809, but it cannot run under the 1903. see below is my method steps:

1. First, I used WMI to get the camera PDO (Physical Device Object name)

2. Second, I used the .net class to enumerate the existing processes and filter the non-window processes.

3. Then, I used the Win32 API to enumerate the handles of these window processes.

4. Finally, I still used the Win32 API to convert the device handle to the device PDO, then I find the process of using the camera.

the source code from link https://www.codeproject.com/Questions/531409/fileplusisplususedplusbyplusanotherplusprocessplus;


Who can tell me why the OS 1903 cannot use the method "NtQueryObject" to get handle information from other processes? and how to detect the on / off time of the built-in camera and get the process name of using camera?


My app is used C# , and run as a user. does Microsoft have some public APIs to meet my needs?


Thanks.

:)

 

Built in camera

Hi Roy,

The issue you are experiencing with the built-in camera on your device might be caused by the update you installed. However, for us to fully identify the cause of this issue, we would be gathering additional information. Kindly answer the following:

• What troubleshooting steps have you tried so far?
• Can you send us a screenshot of the error message you are getting? Make sure that you remove all personal information.
• Have you tried updating the driver of the built-in camera?
• What is the current version and build number of your computer? To get the information, kindly follow the steps below:
  • Click on the Start menu.
  • Type winver.
  • Press Enter.

 

My built in camera doens't be recognized by windows 10 camera app

Hi Paulo,

Allow us to verify some information to isolate this issue. We would like to ask a few questions.

• Did you receive any error messages when you tried to use the camera with the Camera app?
• Have you tried updating the drivers of your built-in camera?
• Do you have any antivirus installed in your computer?

To help us address this problem, we suggest that you check out the resolution or troubleshooting steps provided on this

link.

Let us know of the result.

Regards.

 

Tried messenger for camera....

Hi,

Normally, the issue with the camera not being detected is caused by an outdated driver or a recent update triggers a system conflict. To assist you with your concern, we suggest that you follow the steps listed on this
link. This is to identify and resolve any issues if Windows
can't detect the device.

Let us know how it goes after performing the suggested steps.