# Enabling Camera Light on Windows 10+ Tablets

Video Capture SDK .Net VideoCaptureCore

# Introduction

Modern Windows 10+ tablets come equipped with camera light functionality that developers can control programmatically. This guide explains how to implement camera light controls in your .NET applications using the TorchControl API.

# Implementation with TorchControl API

The TorchControl API provides a comprehensive way to manage camera lights on Windows 10+ tablets. This API offers:

  • Device discovery for torch-compatible cameras
  • Granular control for enabling and disabling camera lights
  • Cross-device compatibility

# Basic Implementation Steps

  1. Initialize the VideoCaptureCore component
  2. Get available devices with torch capabilities
  3. Enable or disable torch functionality for specific devices

# Working Code Example 

// Initialize VideoCaptureCore
VideoCaptureCore videoCapture = await VideoCaptureCore.CreateAsync();

// Get available devices with torch capability
string[] devices = await videoCapture.TorchControl_GetDevicesAsync();

// Enable torch for the first available device
if (devices.Length > 0)
{
    await videoCapture.TorchControl_EnableAsync(devices[0], true);
}

// Disable torch when needed
await videoCapture.TorchControl_EnableAsync(devices[0], false);

# Complete Implementation Example 

using System;
using System.Windows.Forms;
using VisioForge.Core.VideoCapture;
using VisioForge.Core.WindowsExtensions;

namespace Camera_Light_Demo
{
    public partial class Form1 : Form
    {
        private VideoCaptureCore VideoCapture1;
        private string[] _devices;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (VideoCapture1 != null)
            {
                VideoCapture1.Dispose();
                VideoCapture1 = null;
            }
        }

        private async void btTurnOn_Click(object sender, EventArgs e)
        {
            if (_devices.Length > 0)
            {
                await VideoCapture1.TorchControl_EnableAsync(_devices[0], true);
            }
        }

        private async void btTurnOff_Click(object sender, EventArgs e)
        {
            if (_devices.Length > 0)
            {
                await VideoCapture1.TorchControl_EnableAsync(_devices[0], false);
            }
        }

        private async void Form1_Load(object sender, EventArgs e)
        {
            VideoCapture1 = await VideoCaptureCore.CreateAsync();

            _devices = await VideoCapture1.TorchControl_GetDevicesAsync();
            lbDeviceCount.Text = $"Devices found: {_devices.Length}.";
        }
    }
}

# Required Dependencies

To implement camera light functionality in your application, you'll need:

  1. NuGet Package: Install the VisioForge.DotNet.Core.WindowsExtensions package.

  2. Video Capture Redistributables:

# Complete Sample Application

For a fully functional implementation, explore our Camera Light Demo application available in our GitHub repository.

# Compatibility Notes

  • This functionality is primarily designed for Windows 10 and newer tablet devices
  • Device hardware must support programmable camera light control
  • Some device manufacturers may implement proprietary APIs that require additional configuration

# Troubleshooting Tips

If you encounter issues enabling the camera light:

  • Verify that your device has compatible hardware
  • Ensure all required packages are properly installed
  • Check device permissions in your application manifest
  • Make sure the device reports as torch-capable with TorchControl_GetDevicesAsync()

Visit our GitHub page to access more code samples and examples.