輸入法全角轉換爲半角(轉)

小弟參考前輩的例子試了試看能弄出來嗎?看來前輩就是前輩

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
//新加的
using System.Runtime.InteropServices;

namespace W_QuanBanJiao
{
    public partial class Form1 : Form
    {

        #region 變量及屬性

        //聲明一些API函數
        [DllImport("imm32.dll")]
        public static extern IntPtr ImmGetContext(IntPtr hwnd);
        [DllImport("imm32.dll")]
        public static extern bool ImmGetOpenStatus(IntPtr himc);
        [DllImport("imm32.dll")]
        public static extern bool ImmSetOpenStatus(IntPtr himc, bool b);
        [DllImport("imm32.dll")]
        public static extern bool ImmGetConversionStatus(IntPtr himc, ref int lpdw, ref int lpdw2);
        [DllImport("imm32.dll")]
        public static extern int ImmSimulateHotKey(IntPtr hwnd, int lngHotkey);
        private const int IME_CMODE_FULLSHAPE = 0x8;
        private const int IME_CHOTKEY_SHAPE_TOGGLE = 0x11;

        #endregion

        #region 構造函數

        public Form1()
        {
            InitializeComponent();
        }

        #endregion

        #region 窗體事件

        private void Form1_Load(object sender, EventArgs e)
        {
            SetIme(this);
        }

        static void Form1_Paint(object sender, PaintEventArgs e)
        {
            ChangeControlIme(sender);
        }

        #endregion

        #region 全角轉換爲半角

        //重載SetIme，傳入Form
        public static void SetIme(Form frm)
        {
            frm.Paint += new PaintEventHandler(Form1_Paint);
            ChangeAllControl(frm);
        }
        //重載SetIme，傳入Control
        public static void SetIme(Control ctl)
        {
            ChangeAllControl(ctl);
        }
        //重載SetIme，傳入對象句柄
        public static void SetIme(IntPtr Handel)
        {
            ChangeControlIme(Handel);
        }
        private static void ChangeAllControl(Control ctl)
        {
            //在控件的的Enter事件中觸發來調整輸入法狀態
            ctl.Enter += new EventHandler(ctl_Enter);
            //遍歷子控件，使每個控件都用上Enter的委託處理
            foreach (Control ctlChild in ctl.Controls)
                ChangeAllControl(ctlChild);
        }

        //控件的Enter處理程序
        static void ctl_Enter(object sender, EventArgs e)
        {
            ChangeControlIme(sender);
        }
        private static void ChangeControlIme(object sender)
        {
            Control ctl = (Control)sender;
            ChangeControlIme(ctl.Handle);
        }
        //下面這個函數纔是真正檢查輸入法的全角半角狀態
        private static void ChangeControlIme(IntPtr h)
        {
            IntPtr HIme = ImmGetContext(h);
            if (ImmGetOpenStatus(HIme))  //如果輸入法處於打開狀態
            {
                int iMode = 0;
                int iSentence = 0;
                //檢索輸入法信息
                bool bSuccess = ImmGetConversionStatus(HIme, ref iMode, ref iSentence); 
                if (bSuccess)
                {
                    if ((iMode & IME_CMODE_FULLSHAPE) > 0)   //如果是全角
                        ImmSimulateHotKey(h, IME_CHOTKEY_SHAPE_TOGGLE);  //轉換成半角
                }
            }
        }

        #endregion
    }
}