public bool OnJSAlert(IWebBrowser browser, string url, string message)
{
MessageBox.Show(message);
return true; //阻止js弹
        }
public unsafe bool OnJSConfirm(IWebBrowser browser, string url, string message, bool* retval)
{
DialogResult result = MessageBox.Show(message, "提示", MessageBoxButtons.YesNo);
bool value = result == DialogResult.Yes ? true : false;
//   retval = (bool *)GCHandle.Alloc(value).AddrOfPinnedObject().ToPointer(); //获取托管内存地址，异常
// retval = &value; //改变指针失败
*retval = value;
return true;
}
public unsafe bool OnJSPrompt(IWebBrowser browser, string url, string message, string defaultValue, bool* retval, ref string result)
{
//交互消息
string r = string.Empty;
this.Invoke(new Action(() =>
{
r = Microsoft.VisualBasic.Interaction.InputBox(message, "提示", defaultValue);
}));
result = r;
if (result == defaultValue)
{
*retval = false;
}
else
{
*retval = true;
}
return true;
}