组合框中的UserControl.设置数据绑定

我在用户控件中有一个组合框，我想对它进行数据绑定，但我在visual studio 2008设计器视图的属性菜单中唯一可以访问的是数据源和显示成员。是否有一种方法来设置用户控件，这样我就可以在属性菜单中编辑所选的值成员?

[System.ComponentModel.ComplexBindingProperties("DataSource", "DisplayMember")]
public partial class CustomComboBox : UserControl
{
    private object dataSource;
    private string displayMember;

    [AttributeProvider(typeof(IListSource))]
    public object DataSource
    {
        get
        {
            return this.dataSource;
        }
        set
        {
            this.dataSource = value;
        }
    }
    public String DisplayMember
    {
        get
        {
            return this.displayMember;
        }
        set
        {
            this.displayMember = value;
        }
    }
    public CustomComboBox()
    {
        InitializeComponent();
    }
    private void BindComboBox()
    {
        if (this.dataSource == null || this.displayMember == null)
        {
            return;
        }
        Binding binding = new Binding("DataSource", this.dataSource, this.displayMember, true);
        Binding binding2 = new Binding("DisplayMember", this.dataSource, this.displayMember, true);
        this.comboBox1.DataBindings.Clear();
        this.comboBox1.DataBindings.Add(binding);
        this.comboBox1.DataBindings.Add(binding2);
    }
}