解决vs 2005 中文输入法 存在的bug

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace TestPoject
{
    /// <summary>
    /// 设置输入框的输入法问题
    /// </summary>
    public static class ClsIme
    {
        //声明一些API函数                                                                                                
        [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);

        public const int IME_CMODE_FULLSHAPE = 0x8;
        public const int IME_CHOTKEY_SHAPE_TOGGLE = 0x11;
        //重载SetIme，传入Form                                                                                          
        public static void SetIme(Form frm)
        {
            frm.Paint += new PaintEventHandler(frm_Paint);
            ChangeAllControl(frm);
        }
        //重载SetIme，传入Control                                                                                       
        public static void SetIme(Control ctl)
        {
            ChangeAllControl(ctl);
        }
        //重载SetIme，传入对象句柄                                                                                      
        public static void SetIme(IntPtr Handel)
        {
            OpenControlIme(Handel);
        }
        private static void ChangeAllControl(Control ctl)
        {
            //在控件的的Enter事件中触发来调整输入法状态                                                                     
            ctl.Enter += new EventHandler(ctl_Enter);
            ctl.KeyDown += new KeyEventHandler(ctl_KeyDown);
            //遍历子控件，使每个控件都用上Enter的委托处理                                                                   
            foreach (Control ctlChild in ctl.Controls)
                ChangeAllControl(ctlChild);
        }

        static void ctl_KeyDown(object sender, KeyEventArgs e)
        {
            if ((e.Control && e.Shift))
            {
                OpenControlIme(sender);
            }
        }

        static void OpenControlIme(object sender)
        {
            Control ctl = (Control)sender;
            IntPtr HIme = ImmGetContext(ctl.Handle);
            if (!ImmGetOpenStatus(HIme))
            {
                ImmSetOpenStatus(HIme, true);
            }
        }

        static void frm_Paint(object sender, PaintEventArgs e)
        {
            /**/
            /*有人问为什么使用Pain事件，而不用Load事件或Activated事件，是基于下列考虑：                                 
* 1、在您的Form中，有些控件可能是运行时动态添加的                                                               
* 2、在您的Form中，使用到了非.NET的OCX控件                                                                      
* 3、Form调用子Form的时候，Activated事件根本不会触发 */
            OpenControlIme(sender);
        }
        //控件的Enter处理程序                                                                                           
        static void ctl_Enter(object sender, EventArgs e)
        {
            OpenControlIme(sender);
        }
        private static void ChangeControlIme(object sender)
        {
            Control ctl = sender as Control;
            ChangeControlIme(ctl.Handle);
        }
        //下面这个函数才是真正检查输入法的全角半角状态                                                                  
        private static void ChangeControlIme(IntPtr h)
        {
            ////long hCurKBDLayout = GetKeyboardLayout(0);
            IntPtr HIme = ImmGetContext(h);
            if (ImmGetOpenStatus(HIme)) //如果输入法处于打开状态                                                            
            {
                int iMode = 0;
                int iSentence = 0;
                bool bSuccess = ImmGetConversionStatus(HIme, ref iMode, ref iSentence); //检索输入法信息                        
                if (bSuccess)
                {
                    if ((iMode & IME_CMODE_FULLSHAPE) > 0) //如果是全角                                                             
                        ImmSimulateHotKey(h, IME_CHOTKEY_SHAPE_TOGGLE); //转换成半角                                                    
                }
            }
        }

    }
}