public static void PressSoftKey(string keystring)
        {
            Key key = KeyFromStringNumPadKeyboard(keystring);

            if (key != Key.None)
            {
                byte keyCode = unchecked ((byte)KeyInterop.VirtualKeyFromKey(key));
                SoftKeyboardManager.PressAKey(keyCode);
            }
        }
        public static void PressSoftKey(string keystring, EffectiveKey effectiveKey, bool isshiftpressed, bool iscapslock)
        {
            Key key = KeyFromStringFullKeyboard(keystring, effectiveKey, isshiftpressed, iscapslock);

            if (key != Key.None)
            {
                byte keyCode = unchecked ((byte)KeyInterop.VirtualKeyFromKey(key));

                //处理输入法切换,不同的系统不同的处理方式
                if (key == (Key.LeftShift | Key.LeftCtrl))
                {
                    SoftKeyboardManager.PressAKey(16);

                    ////win8-win10Shift
                    //if (OSVersionHelper.IsWindows8OrGreater)
                    //{
                    //        //16是Shift虚拟键值
                    //        SoftKeyboardManager.PressAKey(16);
                    //}
                    ////XP-win7 Shift+Ctrl
                    //else if (OSVersionHelper.IsWindowsXPOrGreater)
                    //{
                    //        byte keyCodectrl = unchecked((byte)KeyInterop.VirtualKeyFromKey(Key.LeftCtrl));
                    //        SoftKeyboardManager.PressDoubleKey(16, keyCodectrl);
                    //}
                }
                else
                {
                    if (!isshiftpressed)
                    {
                        SoftKeyboardManager.PressAKey(keyCode);
                    }
                    else
                    {
                        SoftKeyboardManager.PressDoubleKey(16, keyCode);
                    }
                }
            }
        }