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MainPage.xaml.cs
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MainPage.xaml.cs
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Devices.Enumeration;
using Windows.Devices.I2c;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.System.Display;
// The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
namespace Win10IoTDisplayOff
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
}
private async void Button_Click(object sender, RoutedEventArgs e)
{
SetMonitorState(MonitorState.OFF);
}
private int SC_MONITORPOWER = 0xF170;
private uint WM_SYSCOMMAND = 0x0112;
[DllImport("user32.dll")]
static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
enum MonitorState
{
ON = -1,
OFF = 2,
STANDBY = 1
}
private void SetMonitorState(MonitorState state)
{
IntPtr hWnd = new IntPtr(0xFFFF); // Broadcast to all
SendMessage(hWnd, WM_SYSCOMMAND, (IntPtr)SC_MONITORPOWER, (IntPtr)state);
}
}
}