C#用代碼打開軟鍵盤

using System;
  using System.Collections.Generic;
  using System.ComponentModel;
  using System.Data;
  using System.Drawing;
  using System.Text;
  using System.Windows.Forms;
  using System.Runtime.InteropServices;
  
  namespace InputLanguageSwitch
  {
   /// <summary>
   /// 獲取系統所有的輸入法，並可以程序改變當前輸入法；打開關閉軟鍵盤。
   /// 程序：房客
   /// QQ：83849123
   /// Blog：http://www.cnblogs.com/sxlfybb
   /// </summary>
   public partial class Form1 : Form
   {
   public Form1()
   {
   InitializeComponent();
   this.InputLanguageChanged += new InputLanguageChangedEventHandler(Form1_InputLanguageChanged);
   }
  
   void Form1_InputLanguageChanged(object sender, InputLanguageChangedEventArgs e)
   {
   //throw new Exception("The method or Operation is not implemented.");
   for( int i=0;i<comboBox1.Items.Count;i++)
   {
   if (InputLanguage.CurrentInputLanguage.LayoutName == comboBox1.Items[i].ToString())
   {
   comboBox1.SelectedIndex = i;
   }
  
   }
   }
  
   private void comboBox1_SelectedIndExchanged(object sender, EventArgs e)
   {
   string strTemp = comboBox1.Items[comboBox1.SelectedIndex].ToString();
   InputLanguageCollection collects = InputLanguage.InstalledInputLanguages;
   for (int i = 0; i < collects.Count; i++)
   {
   if (collects[i].LayoutName == strTemp)
   InputLanguage.CurrentInputLanguage = collects[i];
   }
  
   }
  
   private void Form1_Load(object sender, EventArgs e)
   {
   InputLanguageCo