using System;  
using System.Windows.Forms;  

namespace WindowsFormsApplication1  
{  
    public partial class Form1 : Form  
    {  
        public Form1()  
        {  
            InitializeComponent();  
        }  

        private void 打開form2隱藏form1_Click(object sender, EventArgs e)  
        {  
            Form2 f = new Form2();  
            f.fatherForm = this;  
            f.Show();  
            this.Hide();  
        }  
    }  
}

Form2

復(fù)制代碼代碼如下:

using System;  
using System.Windows.Forms;  

namespace WindowsFormsApplication1  
{  
    public partial class Form2 : Form  
    {  
        public Form2()  
        {  
            InitializeComponent();  
        }  

        public Form1 fatherForm;  

        private void 打開from3_Click(object sender, EventArgs e)  
        {  
            Form3 f = new Form3();  
            f.fatherForm = this;  
            f.Show();  
        }  
    }  
}

Form3

復(fù)制代碼代碼如下:

using System;  
using System.Windows.Forms;  

namespace WindowsFormsApplication1  
{  
    public partial class Form3 : Form  
    {  
        public Form3()  
        {  
            InitializeComponent();  
        }  

        public Form2 fatherForm;  

        private void 關(guān)閉form3from2顯示from1_Click(object sender, EventArgs e)  
        {  
            fatherForm.fatherForm.Show();  
            fatherForm.Close();  
            this.Close();  
        }  

    }  
}