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 = ;

        private const UInt32 SC_CLOSE = ;

        [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();

            TouchhWnd = FindWindow("IPTip_Main_Window", null);

            if (TouchhWnd == IntPtr.Zero)

                return;

            PostMessage(TouchhWnd, WM_SYSCOMMAND, SC_CLOSE, );

        }

        #endregion

    }