我如何可以检测到窗口10进入平板电脑模式在Windows窗体应用程序？

问题描述：

更新

虽然不是最完美的解决方案，一个方法，似乎工作就是看相关的注册表值。下面是使用WMI做到这一点的一个例子。我很乐意从别人听到，如果有比这更好的解决方案。

While not the most elegant solution, one method that seems to work is to watch the relevant registry value. Here's an example using WMI to do this. I'd be happy to hear from anyone if there's a better solution than this.

using System;
using System.Management;
using System.Security.Principal;
using System.Windows.Forms;
using Microsoft.Win32;

public partial class MainForm : Form
{
    public MainForm()
    {
        this.InitializeComponent();
        this.UpdateModeFromRegistry();

        var currentUser = WindowsIdentity.GetCurrent();
        if (currentUser != null && currentUser.User != null)
        {
            var wqlEventQuery = new EventQuery(string.Format(@"SELECT * FROM RegistryValueChangeEvent WHERE Hive='HKEY_USERS' AND KeyPath='{0}\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\ImmersiveShell' AND ValueName='TabletMode'", currentUser.User.Value));
            var managementEventWatcher = new ManagementEventWatcher(wqlEventQuery);
            managementEventWatcher.EventArrived += this.ManagementEventWatcher_EventArrived;
            managementEventWatcher.Start();
        }
    }

    private void ManagementEventWatcher_EventArrived(object sender, EventArrivedEventArgs e)
    {
        this.UpdateModeFromRegistry();
    }

    private void UpdateModeFromRegistry()
    {
        var tabletMode = (int)Registry.GetValue("HKEY_CURRENT_USER\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\ImmersiveShell", "TabletMode", 0);
        if (tabletMode == 1)
        {
            Console.Write(@"Tablet mode is enabled");
        }
        else
        {
            Console.Write(@"Tablet mode is disabled");
        }
    }
}

原始的问题

使用新的Windows 10连续的功能，我很感兴趣，使我的Windows某些优化窗体基于用户是否在平板模式的应用程序（或没有）。

I'm interested in make some optimizations in my Windows Forms application based on whether a user is in "Tablet Mode" (or not) using the new Windows 10 Continuum feature.

有关于如何在https://msdn.microsoft.com/en-us/library/windows/hardware/dn917883(v=vs.85).aspx （即检查当前视图的UserInteractionMode，看它是否是UserInteractionMode.Mouse或UserInteractionMode.Touch），但我不知道是否或如何，我可以在Windows窗体做同样的。

There is some guidance on how to do this in a UWP project at https://msdn.microsoft.com/en-us/library/windows/hardware/dn917883(v=vs.85).aspx (i.e. check the current view's UserInteractionMode to see if it's UserInteractionMode.Mouse or UserInteractionMode.Touch), however I'm not sure if or how I can do the same in Windows Forms.

请问有没有什么办法，我可以从我的Windows窗体应用程序调用必要的UWP的API，或者是有一些Windows窗体相当于我可以使用？

Would there be any way I can call the necessary UWP APIs from my Windows Forms application, or is there some Windows Forms equivalent I can use?

答

要获得系统是否处于平板模式与否，查询系统度量ConvertibleSlateMode像这样（没有测试过，但它应该做工精细，早在XP ）：

To get whether the system is in tablet mode or not, query the system metric ConvertibleSlateMode like so (not tested, but it should work fine as far back as XP):

public static class TabletPCSupport
{
   private static readonly int SM_CONVERTIBLESLATEMODE = 0x2003;
   private static readonly int SM_TABLETPC = 0x56;

   private Boolean isTabletPC = false;

   public Boolean SupportsTabletMode { get { return isTabletPC; }}

   public Boolean IsTabletMode 
   {
       get
       {
           return QueryTabletMode();
       }
   }

   static TabletPCSupport ()
   {
        isTabletPC = (GetSystemMetrics(SM_TABLETPC) != 0);
   }

   [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto, EntryPoint = "GetSystemMetrics")]
   private static extern int GetSystemMetrics (int nIndex);

   private static Boolean QueryTabletMode ()
   {
       int state = GetSystemMetrics(SM_CONVERTIBLESLATEMODE);
       return (state == 0) && isTabletPC;
   }
}

（文档的这里）

我如何可以检测到窗口10进入平板电脑模式在Windows窗体应用程序？

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