如何重载ComboBox 使其下拉按钮（带下箭头的）和下拉列表的垂直滚动条的宽度改变？

Question

如何重载ComboBox 使其下拉按钮（带下箭头的）和下拉列表的垂直滚动条的宽度改变？

Answer 1

to enaking:
是自定义控件吗？

Answer 2

网上找找资料,应该问题不大.http://hi.csdn.net/chengking/profile他的博客里面看看.

Answer 3

    谢谢enaking，通过将不同的控件拼接在一起的方式，将此问题解决了。结贴，散分。
    详细的实例我将放在我的博客http://blog.csdn.net/SCSDN上。
    public partial class ComboBoxDIY : UserControl
    {
        public bool buttondown = false;
        public ComboBoxDIY()
        {
            InitializeComponent();
            this.listBox1.Visible = false;
            this.vScrollBar1.Visible = false;
        }        private void button1_Click(object sender, EventArgs e)
        {
            //下拉按钮未曾按下
            if (this.buttondown==false)
            {
                //listbox所有数据的项数
                int count = this.listBox1.Items.Count;
                //获取listbox所能显示的项数
                int displaycount = this.listBox1.Height / this.listBox1.ItemHeight;
                //滚动条显示的最大值
                int scrollmax = 0;
                //垂直方向上显示内容数目大于所能显示的数目时
                //垂直滚动条直接可见
                if (count > displaycount)
                {
                    scrollmax = count - 1;
                    this.vScrollBar1.Visible = true;
                }
                this.vScrollBar1.LargeChange = displaycount;
                this.vScrollBar1.Maximum = scrollmax;
                this.vScrollBar1.Minimum = 0;
                this.vScrollBar1.Scroll += new ScrollEventHandler(vscroll);
                
                this.listBox1.Visible = true;
                //下拉按钮按下
                this.buttondown = true;
            }
            //下拉按钮已按下
            else 
            {
                if(this.vScrollBar1.Visible)this.vScrollBar1.Visible = false;
                this.listBox1.Visible = false;
                //下拉按钮弹起
                this.buttondown = false;
            }
        }        private void vscroll(object sender, ScrollEventArgs e)
        {
            //ScrollBar控制listBox滚动
            this.listBox1.TopIndex=e.NewValue;
        }        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            //文本框显示选择结果
            this.textBox1.Text =this.listBox1.Items[this.listBox1.SelectedIndex].ToString();
            this.vScrollBar1.Visible = false;
            this.listBox1.Visible = false;
            //下拉按钮弹起
            this.buttondown = false;
        }
    }