cs winform 虚拟键盘

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Management;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace SnPrintStampClient.Forms
{
public class VirtualKeyboardHelper
{
private const uint WS_VISIBLE = 0x10000000;
private const int GWL_STYLE = -16;
private const int WM_SYSCOMMAND = 0x0112;
private const uint SC_CLOSE = 0xF060;
private const int WS_DISABLED = 0x08000000;
private const int DWMWA_CLOAKED = 14;

    private const string ApplicationFrameHostClassName = "ApplicationFrameWindow";
    private const string CoreWindowClassName = "Windows.UI.Core.CoreWindow";

    private const string TextInputApplicationCaption = "Microsoft Text Input Application";


    /// <summary>
    ///     win10 虚拟键盘路径
    /// </summary>
    private const string Win10TabTipPath = @"C:\Program Files\Common Files\microsoft shared\ink\TabTip.exe";

    /// <summary>
    ///     win7 虚拟键盘路径
    /// </summary>
    private const string Win7OskPath = @"C:\WINDOWS\system32\osk.exe";

    /// <summary>
    ///     虚拟键盘 窗口名称
    /// </summary>
    private const string TabTipWindowClassName = "IPTIP_Main_Window";

    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

    [DllImport("user32.dll", EntryPoint = "FindWindowEx")]
    private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass,
        string lpszWindow);


    [DllImport("user32.dll", EntryPoint = "GetWindowLong")]
    private static extern int GetWindowLong(IntPtr hWnd, int nIndex);

    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
    private static extern bool PostMessage(IntPtr hWnd, int msg, uint wParam, uint lParam);


    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern bool Wow64DisableWow64FsRedirection(ref IntPtr ptr);

    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern bool Wow64RevertWow64FsRedirection(IntPtr ptr);


    [DllImport("user32.dll", EntryPoint = "GetDesktopWindow", SetLastError = false)]
    private static extern IntPtr GetDesktopWindow();

    [DllImport("dwmapi.dll", EntryPoint = "DwmGetWindowAttribute")]
    private static extern int DwmGetWindowAttribute(IntPtr intPtr, int dwAttribute, out int pvAttribute,
        uint cbAttribute);



    /// <summary>
    /// 判断键盘是否连接
    /// </summary>
    /// <returns></returns>
    public static bool IsKeyboardAttached()
    {
        try
        {
            ManagementObjectSearcher searcher =
                new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_Keyboard");

            int devCount = 0;

            foreach (ManagementObject obj in searcher.Get())
            {
                if (obj["Status"].ToString().Contains("OK")) // if device is ready
                {
                    //surface测试时发现，HID设备，不是键盘，比较特殊
                    if (!obj["Description"].ToString().Contains("HID Keyboard Device"))
                    {
                        devCount++;
                    }
                }
            }

            return devCount > 0;
        }
        catch (Exception)
        {
            return false;
        }
    }

    /// <summary>
    ///     打开虚拟键盘，目前支持win7 64位，win10 64位，exe编译为x86。
    /// </summary>
    public static void ShowVirtualKeyboard()
    {
        //+------------------------------------------------------------------------------+
        //|                    |   PlatformID    |   Major version   |   Minor version   |
        //+------------------------------------------------------------------------------+
        //| Windows 95         |  Win32Windows   |         4         |          0        |
        //| Windows 98         |  Win32Windows   |         4         |         10        |
        //| Windows Me         |  Win32Windows   |         4         |         90        |
        //| Windows NT 4.0     |  Win32NT        |         4         |          0        |
        //| Windows 2000       |  Win32NT        |         5         |          0        |
        //| Windows XP         |  Win32NT        |         5         |          1        |
        //| Windows 2003       |  Win32NT        |         5         |          2        |
        //| Windows Vista      |  Win32NT        |         6         |          0        |
        //| Windows 2008       |  Win32NT        |         6         |          0        |
        //| Windows 7          |  Win32NT        |         6         |          1        |
        //| Windows 2008 R2    |  Win32NT        |         6         |          1        |
        //| Windows 8          |  Win32NT        |         6         |          2        |
        //| Windows 8.1        |  Win32NT        |         6         |          3        |
        //+------------------------------------------------------------------------------+
        //| Windows 10         |  Win32NT        |        10         |          0        |

        try
        {
            var isWin7 = Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Minor == 1;
            var isWin8OrWin10 =
                Environment.OSVersion.Version.Major == 6 && Environment.OSVersion.Version.Minor == 2;
            var isWin10 = Environment.OSVersion.Version.Major == 10 && Environment.OSVersion.Version.Minor == 0;
            if (isWin7)
            {
                //win7
                ShowWin7VirtualKeyboard();
            }
            else if (isWin8OrWin10 || isWin10)
            {
                //win10 
                ShowWin10VirtualKeyboard();
            }
        }
        catch (Exception)
        {
            // ignored
        }
    }
    /// <summary>
    /// 关闭虚拟键盘
    /// </summary>
    public void CloseVirtualKeyboard()
    {
        var touchhWnd = FindWindow("IPTip_Main_Window", null);
        if (touchhWnd == IntPtr.Zero)
        {
            return;
        }

        PostMessage(touchhWnd, WM_SYSCOMMAND, SC_CLOSE, 0);
    }
    private static void ShowWin7VirtualKeyboard()
    {
        if (!Environment.Is64BitProcess && Environment.Is64BitOperatingSystem)
        {
            //32位程序 运行在64位系统上，打开32位程序，需要禁用文件重定向
            var ptr = new IntPtr();
            var isWow64FsRedirectionDisabled = Wow64DisableWow64FsRedirection(ref ptr);

            Process.Start(Win7OskPath);

            if (isWow64FsRedirectionDisabled)
            {
                Wow64RevertWow64FsRedirection(ptr);
            }
        }
        else if (Environment.Is64BitProcess && Environment.Is64BitOperatingSystem)
        {
            Process.Start(Win7OskPath);
        }
    }

    private static void ShowWin10VirtualKeyboard()
    {
        if (!IsTabTipProcessPresent())
        {
            Process.Start(Win10TabTipPath);
            while (!IsValidHandle(FindWindow("IPTIP_Main_Window", "")))
            {
                Thread.Sleep(100);
            }
        }

        //判断可见性
        if (!IsWin10OnScreenKeyboardVisible())
        {
            ShowByCom();
        }
    }

    private static bool IsWin10OnScreenKeyboardVisible()
    {
        var handle = FindWindow(TabTipWindowClassName, "");
        if (!IsValidHandle(handle))
        {
            return false;
        }

        var isVisible = IsWindowVisibleByHandle(handle);
        if (isVisible.HasValue)
        {
            return isVisible.Value;
        }

        // hard way
        var textInputHandle = FindTextInputWindow();
        return IsValidHandle(textInputHandle);
    }

    private static IntPtr FindTextInputWindow()
    {
        var lastProbed = IntPtr.Zero;
        do
        {
            lastProbed = FindWindowEx(IntPtr.Zero, lastProbed, ApplicationFrameHostClassName, null);
            if (IsValidHandle(lastProbed))
            {
                var textInput = FindWindowEx(lastProbed, IntPtr.Zero, CoreWindowClassName,
                    TextInputApplicationCaption);
                return textInput;
            }
        } while (IsValidHandle(lastProbed));

        return IntPtr.Zero;
    }



    private static bool? IsWindowVisibleByHandle(IntPtr handle)
    {
        var style = GetWindowLong(handle, GWL_STYLE);
        //Console.WriteLine( "Style {0:X8}", style );

        // if is disabled - not visible
        if ((style & WS_DISABLED) != 0)
        {
            return false;
        }

        // if has visible style - visible :)
        if ((style & WS_VISIBLE) != 0)
        {
            return true;
        }

        // DWM Window can be cloaked
        // see https://social.msdn.microsoft.com/Forums/vstudio/en-US/f8341376-6015-4796-8273-31e0be91da62/difference-between-actually-visible-and-not-visiblewhich-are-there-but-we-cant-see-windows-of?forum=vcgeneral
        if (DwmGetWindowAttribute(handle, DWMWA_CLOAKED, out var cloaked, 4) == 0)
        {
            if (cloaked != 0)
            {
                return false;
            }
        }

        // undefined
        return null;
    }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    private static bool IsValidHandle(IntPtr handle)
    {
        // if (?:) will be eliminated by jit
        return IntPtr.Size == 4
            ? handle.ToInt32() > 0
            : handle.ToInt64() > 0;
    }

    private static bool IsTabTipProcessPresent()
    {
        var handle = FindWindow(TabTipWindowClassName, "");
        return IntPtr.Size == 4
            ? handle.ToInt32() > 0
            : handle.ToInt64() > 0;
    }

    private static void ShowByCom()
    {
        ITipInvocation instance = null;
        try
        {
            instance = (ITipInvocation)Activator.CreateInstance(ComTypes.TipInvocationType);
            instance.Toggle(GetDesktopWindow());
        }
        finally
        {
            if (!ReferenceEquals(instance, null))
            {
                Marshal.ReleaseComObject(instance);
            }
        }
    }
}

[ComImport]
[Guid("37c994e7-432b-4834-a2f7-dce1f13b834b")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
internal interface ITipInvocation
{
    void Toggle(IntPtr hwnd);
}

internal static class ComTypes
{
    internal static readonly Guid ImmersiveShellBrokerGuid;
    internal static readonly Type ImmersiveShellBrokerType;

    internal static readonly Guid TipInvocationGuid;
    internal static readonly Type TipInvocationType;

    static ComTypes()
    {
        TipInvocationGuid = Guid.Parse("4ce576fa-83dc-4F88-951c-9d0782b4e376");
        TipInvocationType = Type.GetTypeFromCLSID(TipInvocationGuid);

        ImmersiveShellBrokerGuid = new Guid("228826af-02e1-4226-a9e0-99a855e455a6");
        ImmersiveShellBrokerType = Type.GetTypeFromCLSID(ImmersiveShellBrokerGuid);
    }
}

}