1  private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
 2         {
 3             base.OnMouseDown(e);
 4             if (e.Button == MouseButtons.Left)
 5             {
 6 
 7                 m_MouseDownPoint = e.Location;
 8                 this.m_ImgTmpPoint = this.m_ImgDrawPoint;
 9                 Rectangle rect = new Rectangle(this.m_ImgDrawPoint.X, this.m_ImgDrawPoint.Y, this.image.Width, this.image.Height);
10                 m_MouseInImage = rect.Contains(e.Location);
11                 if (m_MouseInImage)
12                 {
13                     Point msPoint = e.Location;
14                     msPoint.Offset(-this.m_ImgDrawPoint.X, -this.m_ImgDrawPoint.Y);
15                
16                     pictureBox1.Cursor = Cursors.Default;
17                     textBox3.Text = "X:"+msPoint.X + ",Y" + msPoint.Y;
18                     font_x = msPoint.X;
19                     font_y = msPoint.Y;
20                 }
21 
22             }
23         }

 1  private void button2_Click(object sender, EventArgs e)
 2         {
 3             if (file == "")
 4             {
 5                 MessageBox.Show("你还没添加素材");
 6             }
 7             else
 8             {
 9                 image = Image.FromFile(file);
10                 SolidBrush brush = new SolidBrush(label2.ForeColor);
11                 using (Graphics g = Graphics.FromImage(image))
12                 {
13                     g.DrawString(textBox1.Text, label2.Font,
14                         brush, new PointF(font_x, font_y));
15                     g.Flush();
16                 }
17                 pictureBox1.Image = image;
18                 this.pictureBox1.Refresh();
19             }
20         }