public class KeyBoardHelper    {        #region 键盘控制        /// <summary>        /// 显示键盘        /// </summary>        public static void ShowInputPanel()        {            string path = @"C:\Program Files\Common Files\microsoft shared\ink\TabTip.exe";            string path32 = @"C:\Program Files (x86)\Common Files\Microsoft Shared\Ink\TabTip32.exe";            if (File.Exists(path))            {                Process.Start(path);            }            else if (File.Exists(path32))            {                Process.Start(path32);            }        }        #region import 软键盘         [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]        private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);        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, uint wParam, uint lParam);        #endregion       /// <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);        }        #endregion     }