//子窗体代码
=======================
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
private void InitData(DataSet ds)
{
DataTable dt = new DataTable("TabeHost");
DataColumn dc = new DataColumn("IpAddress",typeof(string));
dt.Columns.Add(dc);
dc = new DataColumn("UserName",typeof(string));
dt.Columns.Add(dc);
dc = new DataColumn("Password",typeof(string));
dt.Columns.Add(dc);
ds.Tables.Add(dt);