C#弹出和影藏WIN10、WIN8平板模式的触摸键盘

 在WIN10和WIN8的平板系统下我们的应用程序可能需要用户输入字符,这种需求有两个解决方案。

1、应用程序创建一个模拟键盘的页面,但是有一定局限性。比如你应用程序调用第三方的DLL或者exe弹出来的输入框你是没有办法跨进程录入数据的(如果有的话实现起来也绝壁吐血....)；

2、使用操作系统的模拟键盘，简单高效。哪怕是你主程序在调用第三方DLL或者exe都可以，流程就是先异步开启模拟键盘，再调用第三方的弹框方法，第三方弹框方法结束后关闭模拟键盘；

使用第二种方法简直完美解决这个需求好么。好啦，需求就说到这，码上再说~~~

 /// <summary>
    /// 模拟键盘
    /// 对应WIN10、WIN8下的平板系统对应的系统模拟键盘
    /// </summary>
    public class AnalogKeyBox
    {
        private const Int32 WM_SYSCOMMAND = 274;
        private const UInt32 SC_CLOSE = 61536;
        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern bool PostMessage(IntPtr hWnd, int Msg, int wParam, int lParam);
        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern bool PostMessage(IntPtr hWnd, int Msg, uint wParam, uint lParam);
        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern bool PostMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern int RegisterWindowMessage(string lpString);

        /// <summary>
        /// 显示屏幕键盘
        /// </summary>
        /// <returns></returns>
        public static int ShowInputPanel()
        {
            try
            {
                dynamic file = "C:\\Program Files\\Common Files\\microsoft shared\\ink\\TabTip.exe";
                if (!System.IO.File.Exists(file))
                    return -1;
                Process.Start(file);
                //return SetUnDock(); //不知SetUnDock()是什么，所以直接注释返回1
                return 1;
            }
            catch (Exception)
            {
                return 255;
            }
        }


        /// <summary>
        ///  异步开启模拟键盘
        /// </summary>
        /// <returns></returns>
        public static async Task ShowInputPanelAsync()
        { 
            await Task.Run(() => ShowInputPanel());
        }
        /// <summary>
        /// 隐藏屏幕键盘
        /// </summary>
        public static void HideInputPanel()
        {
            IntPtr TouchhWnd = new IntPtr(0);
            TouchhWnd = FindWindow("IPTip_Main_Window", null);
            if (TouchhWnd == IntPtr.Zero)
                return;
            PostMessage(TouchhWnd, WM_SYSCOMMAND, SC_CLOSE, 0);
        }
    }