c# – 在DWM玻璃下使用TextBox进行测试

几乎完美的结果代码我发现这里：http://social.msdn.microsoft.com/Forums/en-US/vbgeneral/thread/316a178e-252b-480d-8cc9-85814c2073d8/,但它有很多轻弹和事件特定的操作(例如：键入一些文本,并按下主页按钮).

我试图解决这些问题.

以下代码是原始代码的突变,但它不依赖于任何事件,只是WM_PAINT.它仍然闪烁,插入符号(文本光标)以某种方式消失！

如何防止闪烁,以及如何获取插入符号(文字光标)？

谢谢.

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Imaging;
using System.Diagnostics;

namespace AeroWindowsFormsApplication
{
    public class AeroTextBox : TextBox
    {
        private const int WM_PAINT = 0xf;

        private bool _aeroFix;

        public AeroTextBox()
        {
            SetStyle(ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint,true);
        }

        protected override void WndProc(ref Message m)
        {
            if (_aeroFix)
            {
                switch (m.Msg)
                {
                    case WM_PAINT:
                        RedrawAsBitmap();
                        m.Result = new IntPtr(1);
                        break;

                    default:
                        base.WndProc(ref m);
                        break;
                }
            }
            else
            {
                base.WndProc(ref m);
            }
        }

        private void RedrawAsBitmap()
        {
            using (Bitmap bm = new Bitmap(this.Width,this.Height))
            using (Graphics g = this.CreateGraphics())
            {
                this.DrawToBitmap(bm,this.ClientRectangle);
                g.DrawImageUnscaled(bm,-1,-1);
            }
        }

        public bool AeroFix
        {
            get { return _aeroFix; }
            set 
            {
                if (_aeroFix != value)
                {
                    Invalidate();
                }

                _aeroFix = value;
            }
        }
    }
}