C# Active控件，并触发javascript事件

创建一个Winform用户控件 UserControl1
 using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Reflection;
namespace MyActiveTest
{

[ComVisible(true)]
[ClassInterface(ClassInterfaceType.AutoDual)]
[ComSourceInterfaces(typeof(UserControl1Events))]
[Guid("B0CF6712-4798-424d-8D08-A1E1E2F53B74")]
public partial class UserControl1 : UserControl, IObjectSafety
{
public delegate void SubmitClickedHandler();
public event SubmitClickedHandler SubmitClicked;
public UserControl1()
{
InitializeComponent();
}
//
private string _mymessage;
public string Mymessage
{
get { return _mymessage; }
set { _mymessage = value; }
}
string _param = "http://www.163.com";
public string Param
{
get
{
return _param;
}
set
{
_param = value;
}
}
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show(_mymessage);
if (SubmitClicked != null)
// _param = "这是一个测试的文件";
SubmitClicked();
}
public void ttMessageBox()
{
MessageBox.Show("sdsdfsd");
}

#region IObjectSafety 成员
public void GetInterfacceSafyOptions(int riid, out int pdwSupportedOptions, out int pdwEnabledOptions)
{
pdwSupportedOptions = 1;
pdwEnabledOptions = 2;
}
public void SetInterfaceSafetyOptions(int riid, int dwOptionsSetMask, int dwEnabledOptions)
{
//throw new Exception("The method or operation is not imple