定义一个种，继承ToolboxService，需要using哪些

定义一个类，继承ToolboxService，需要using哪些
在做自定义界面的时候，要用到toolbox，于是自定义一个类，继承ToolboxService
但是调试的时候发现少了引用，我已经引用了
using   System;
using   System.Collections;
using   System.ComponentModel;
using   System.Data;
using   System.Windows.Forms;
using   System.ComponentModel.Design;
using   System.Drawing.Design;

另外，如果定义好了，改如何封装呢？

[解决办法]
没有用过 帮顶！
[解决办法]
帮顶
[解决办法]
^_^,加下面的吧,
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
[解决办法]
新建一个窗体，拖一个到窗体上看看就知道
[解决办法]
using System;
using System.Windows.Forms;
using System.Drawing.Design;

namespace Hosting
{
internal class ToolboxService : ListBox, IToolboxService
{
internal Control designPanel = null;

public ToolboxService()
{
}

public void AddCreator(System.Drawing.Design.ToolboxItemCreatorCallback creator, string format, System.ComponentModel.Design.IDesignerHost host)
{
// No implementation
}

public void AddCreator(System.Drawing.Design.ToolboxItemCreatorCallback creator, string format)
{
// No implementation
}

public void AddLinkedToolboxItem(System.Drawing.Design.ToolboxItem toolboxItem, string category, System.ComponentModel.Design.IDesignerHost host)
{
// No implementation
}

public void AddLinkedToolboxItem(System.Drawing.Design.ToolboxItem toolboxItem, System.ComponentModel.Design.IDesignerHost host)
{
// No implementation
}

public void AddToolboxItem(System.Drawing.Design.ToolboxItem toolboxItem, string category)
{
AddToolboxItem(toolboxItem);
}

public void AddToolboxItem(System.Drawing.Design.ToolboxItem toolboxItem)
{
Items.Add(toolboxItem);
}

public System.Drawing.Design.ToolboxItem DeserializeToolboxItem(object serializedObject, System.ComponentModel.Design.IDesignerHost host)
{
return null;
}

public System.Drawing.Design.ToolboxItem DeserializeToolboxItem(object serializedObject)
{
return null;
}

public System.Drawing.Design.ToolboxItem GetSelectedToolboxItem(System.ComponentModel.Design.IDesignerHost host)
{
return GetSelectedToolboxItem();
}

public System.Drawing.Design.ToolboxItem GetSelectedToolboxItem()
{
if (base.SelectedIndex == -1)
return null;
else
return (ToolboxItem)base.SelectedItem;
}

public System.Drawing.Design.ToolboxItemCollection GetToolboxItems(string category, System.ComponentModel.Design.IDesignerHost host)
{
return GetToolboxItems();
}

public System.Drawing.Design.ToolboxItemCollection GetToolboxItems(string category)
{
return GetToolboxItems();
}

public System.Drawing.Design.ToolboxItemCollection GetToolboxItems(System.ComponentModel.Design.IDesignerHost host)
{
return GetToolboxItems();
}

public System.Drawing.Design.ToolboxItemCollection GetToolboxItems()
{
ToolboxItem[] t = new ToolboxItem[Items.Count];
Items.CopyTo(t, 0);

return new ToolboxItemCollection(t);

}

public bool IsSupported(object serializedObject, System.Collections.ICollection filterAttributes)
{
return false;
}

public bool IsSupported(object serializedObject, System.ComponentModel.Design.IDesignerHost host)
{
return false;
}

public bool IsToolboxItem(object serializedObject, System.ComponentModel.Design.IDesignerHost host)
{
return false;
}

public bool IsToolboxItem(object serializedObject)
{
return false;
}

//public void Refresh()
//{
//base.Refresh();
//}

public void RemoveCreator(string format, System.ComponentModel.Design.IDesignerHost host)
{
// No implementation
}

public void RemoveCreator(string format)
{
// No implementation
}

public void RemoveToolboxItem(System.Drawing.Design.ToolboxItem toolboxItem, string category)
{
RemoveToolboxItem(toolboxItem);
}

public void RemoveToolboxItem(System.Drawing.Design.ToolboxItem toolboxItem)
{
Items.Remove(toolboxItem);
}

public void SelectedToolboxItemUsed()
{
base.SelectedIndex = -1;
}

public object SerializeToolboxItem(System.Drawing.Design.ToolboxItem toolboxItem)
{
return null;
}

public bool SetCursor()
{
if (base.SelectedIndex == -1)
designPanel.Cursor = Cursors.Default;
else
designPanel.Cursor = Cursors.Cross;

return true;
}

public void SetSelectedToolboxItem(System.Drawing.Design.ToolboxItem toolboxItem)
{
base.SelectedItem = toolboxItem;
}

public System.Drawing.Design.CategoryNameCollection CategoryNames
{
get
{
return null;
}
}

public string SelectedCategory
{
get
{
return null;
}
set
{
}
}

private bool ShouldSerializeItems()
{
return false;
}
}
}