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

    private void button1_Click(object sender, EventArgs e)
    {
        if (openFileDialog1.ShowDialog() == DialogResult.OK)
        {
            pictureBox1.Image = Image.FromFile(openFileDialog1.FileName);
        }
    }

    private void button2_Click(object sender, EventArgs e)
    {
        if (openFileDialog2.ShowDialog() == DialogResult.OK)
        {
            pictureBox2.Image = Image.FromFile(openFileDialog2.FileName);
        }
    }

    private void button3_Click(object sender, EventArgs e)
    {
        if (pictureBox1.Image != null && pictureBox2.Image != null)
        {
            Bitmap bt = new Bitmap(pictureBox1.Image);
            Graphics g = Graphics.FromImage(bt);
            g.DrawImage(pictureBox2.Image,new Point(5,5));
            pictureBox3.Image = bt;
        }
    }
}

partial class Form1
{
    /// <summary>
    /// 必需的設計器變量。
    /// </summary>
    private System.ComponentModel.IContainer components = null;

    /// <summary>
    /// 清理所有正在使用的資源。
    /// </summary>
    /// <param name="disposing">如果應釋放托管資源，為 true；否則為 false。</param>
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Windows 窗體設計器生成的代碼

    /// <summary>
    /// 設計器支持所需的方法 - 不要
    /// 使用代碼編輯器修改此方法的內(nèi)容。
    /// </summary>
    private void InitializeComponent()
    {
        this.button1 = new System.Windows.Forms.Button();
        this.button2 = new System.Windows.Forms.Button();
        this.pictureBox1 = new System.Windows.Forms.PictureBox();
        this.pictureBox2 = new System.Windows.Forms.PictureBox();
        this.button3 = new System.Windows.Forms.Button();
        this.pictureBox3 = new System.Windows.Forms.PictureBox();
        this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
        this.openFileDialog2 = new System.Windows.Forms.OpenFileDialog();
        ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
        ((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).BeginInit();
        ((System.ComponentModel.ISupportInitialize)(this.pictureBox3)).BeginInit();
        this.SuspendLayout();
        // 
        // button1
        // 
        this.button1.Location = new System.Drawing.Point(12, 12);
        this.button1.Name = "button1";
        this.button1.Size = new System.Drawing.Size(121, 23);
        this.button1.TabIndex = 0;
        this.button1.Text = "選擇第一張圖片";
        this.button1.UseVisualStyleBackColor = true;
        this.button1.Click += new System.EventHandler(this.button1_Click);
        // 
        // button2
        // 
        this.button2.Location = new System.Drawing.Point(139, 12);
        this.button2.Name = "button2";
        this.button2.Size = new System.Drawing.Size(121, 23);
        this.button2.TabIndex = 1;
        this.button2.Text = "選擇第二張圖片";
        this.button2.UseVisualStyleBackColor = true;
        this.button2.Click += new System.EventHandler(this.button2_Click);
        // 
        // pictureBox1
        // 
        this.pictureBox1.Location = new System.Drawing.Point(12, 41);
        this.pictureBox1.Name = "pictureBox1";
        this.pictureBox1.Size = new System.Drawing.Size(248, 160);
        this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
        this.pictureBox1.TabIndex = 2;
        this.pictureBox1.TabStop = false;
        // 
        // pictureBox2
        // 
        this.pictureBox2.Location = new System.Drawing.Point(12, 216);
        this.pictureBox2.Name = "pictureBox2";
        this.pictureBox2.Size = new System.Drawing.Size(248, 186);
        this.pictureBox2.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
        this.pictureBox2.TabIndex = 3;
        this.pictureBox2.TabStop = false;
        // 
        // button3
        // 
        this.button3.Location = new System.Drawing.Point(266, 12);
        this.button3.Name = "button3";
        this.button3.Size = new System.Drawing.Size(121, 23);
        this.button3.TabIndex = 4;
        this.button3.Text = "合成圖片";
        this.button3.UseVisualStyleBackColor = true;
        this.button3.Click += new System.EventHandler(this.button3_Click);
        // 
        // pictureBox3
        // 
        this.pictureBox3.Location = new System.Drawing.Point(266, 41);
        this.pictureBox3.Name = "pictureBox3";
        this.pictureBox3.Size = new System.Drawing.Size(379, 363);
        this.pictureBox3.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
        this.pictureBox3.TabIndex = 5;
        this.pictureBox3.TabStop = false;
        // 
        // openFileDialog1
        // 
        this.openFileDialog1.Filter = "圖片文件|*.jpg;*.jpeg;*.png;*.bmp";
        // 
        // openFileDialog2
        // 
        this.openFileDialog2.Filter = "圖片文件|*.jpg;*.jpeg;*.png;*.bmp";
        // 
        // Form1
        // 
        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
        this.ClientSize = new System.Drawing.Size(657, 416);
        this.Controls.Add(this.pictureBox3);
        this.Controls.Add(this.button3);
        this.Controls.Add(this.pictureBox2);
        this.Controls.Add(this.pictureBox1);
        this.Controls.Add(this.button2);
        this.Controls.Add(this.button1);
        this.Name = "Form1";
        this.Text = "Form1";
        ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
        ((System.ComponentModel.ISupportInitialize)(this.pictureBox2)).EndInit();
        ((System.ComponentModel.ISupportInitialize)(this.pictureBox3)).EndInit();
        this.ResumeLayout(false);

    }

    #endregion

    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.Button button2;
    private System.Windows.Forms.PictureBox pictureBox1;
    private System.Windows.Forms.PictureBox pictureBox2;
    private System.Windows.Forms.Button button3;
    private System.Windows.Forms.PictureBox pictureBox3;
    private System.Windows.Forms.OpenFileDialog openFileDialog1;
    private System.Windows.Forms.OpenFileDialog openFileDialog2;
}