C#

private void StoreLayoutPanel_MouseDown(object sender, MouseEventArgs e)
    {
    mouseDown = true;
    mouseDownAt = new Point(e.X, e.Y);
    Invalidate();
    }

private void StoreLayoutPanel_MouseUp(object sender, MouseEventArgs e)
    {
    if (mouseDown)
       {
       Rectangle rect = MakeRect(mouseDownAt.X, mouseDownAt.Y, e.X, e.Y);
       rectangles.Add(rect);
       Invalidate();
       }
    mouseDown = false;
    }

private void StoreLayoutPanel_MouseMove(object sender, MouseEventArgs e)
    {
    if (mouseDown)
        {
        mouseRect = MakeRect(mouseDownAt.X, e.X, mouseDownAt.Y, e.Y);
        Invalidate();
        }
    }

private void StoreLayoutPanel_Paint(object sender, PaintEventArgs e)
    {
    Pen pen = new Pen(Color.Black);
    foreach (Rectangle r in rectangles)
        {
        e.Graphics.DrawRectangle(pen, r);
        }
    if (mouseDown)
        {
        Pen p = new Pen(Color.Gray);
        p.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash;
        e.Graphics.DrawRectangle(p, mouseRect);
        }
    }

/// <summary>
/// Make a rectangle from two points
/// The rectangle will use the smallest X and the smallest Y as the TLHC, and
/// the largest X and the largest Y as the BRHC
/// </summary>
/// <param name="p1"></param>
/// <param name="p2"></param>
/// <returns></returns>
private Rectangle MakeRect(Point p1, Point p2)
    {
    return MakeRect(p1.X, p2.X, p1.Y, p2.Y);
    }
/// <summary>
/// Make a rectangle from two points
/// The rectangle will use the smallest X and the smallest Y as the TLHC, and
/// the largest X and the largest Y as the BRHC
/// </summary>
/// <param name="X1"></param>
/// <param name="X2"></param>
/// <param name="Y1"></param>
/// <param name="Y2"></param>
/// <returns></returns>
private Rectangle MakeRect(int X1, int X2, int Y1, int Y2)
    {
    int XL = Math.Min(X1, X2);
    int XR = Math.Max(X1, X2);
    int YL = Math.Min(Y1, Y2);
    int YR = Math.Max(Y1, Y2);
    return new Rectangle(XL, YL, XR - XL, YR - YL);
    }
#endregion

        Image image;
        Bitmap mybitmap;
        Rectangle rect;
        List<Rectangle> rectangles = new List<Rectangle>();
        Graphics g;
private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            
            OpenFD.FileName = "";
            OpenFD.Title = "open image";
            OpenFD.InitialDirectory = "C";
            OpenFD.Filter = "JPEG|*.jpg|Bmp|*.bmp|All Files|*.*.*";
            if (OpenFD.ShowDialog() == DialogResult.OK)
            {
string file = "";
                file = OpenFD.FileName;
                 image = Image.FromFile(file);
                 pictureBox1.Image = image;
                 sz = image.Size;
                 pictureBox1.Size = sz;
                 pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;//this not needed if we give original image size to picturebox
                
            }

private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
        {
            if (stayToolStripMenuItem.Checked == true)
            {

                if (mybitmap == null)
                {
                    mybitmap = new Bitmap(sz.Width, sz.Height);

                }
                rect = new Rectangle(e.X, e.Y, 0, 0);
                this.Invalidate();

            }
             
        }
private void pictureBox1_MouseClick(object sender, MouseEventArgs e)
        {
            
                if (e.Button == MouseButtons.Left)
                
                {
                    rect = new Rectangle(rect.Left, rect.Top, e.X - rect.Left, e.Y - rect.Top);
                    rectangles.Add(rect);
                    pictureBox1.Invalidate();
                   
                }
                
            }
        }


private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            
              
                if (mybitmap == null)
                {
                    return;
                }

                
                    using (g = Graphics.FromImage(mybitmap))
                    {
                        Pen pen = new Pen(Color.Black);
                        foreach (Rectangle r in rectangles)
                        {
                            e.Graphics.DrawRectangle(pen, r);
                            label1.Top = rect.Top; label1.Left = rect.Left; label1.Width = rect.Width;
                            label1.Height = rect.Height;
                            e.Graphics.DrawString(label1.Text, label1.Font, new SolidBrush(label1.ForeColor), rect);
                            g.DrawString(label1.Text, label1.Font, new SolidBrush(label1.ForeColor), rect);
                            g.DrawRectangle(pen, r);
                            
                        }
                        
            }
            

                 
        }


private void saveToolStripMenuItem_Click(object sender, EventArgs e)
        {
                        
            SaveFileDialog SaveFD1 = new SaveFileDialog();
            SaveFD1.FileName = "";
            SaveFD1.InitialDirectory = "C";
            SaveFD1.Title = "save file Name";
            SaveFD1.Filter = "JPG|*.jpg|Bmp|*.bmp";


            if (mybitmap != null)
            {

                if (SaveFD1.ShowDialog() == DialogResult.OK)
                {
                    if (SaveFD1.FileName == "")
                        return;
                    else
                    {

                        System.IO.Stream filename = (System.IO.FileStream)SaveFD1.OpenFile();
                            using (g = Graphics.FromImage(pictureBox1.Image))
                            {
                                foreach (Rectangle r1 in rectangles)
                        {
                            g.DrawImage(mybitmap,0, 0);
                        }

                            }
      
                         pictureBox1.Image.Save(filename, ImageFormat.Jpeg);
                           

                        }
}
}
}

private void textBox1_TextChanged(object sender, EventArgs e)
        {
            label1.Text = textBox1.Text;
         
        }

private void button1_Click(object sender, EventArgs e)
        {
            fontDialog1.ShowDialog();
            label1.Font = fontDialog1.Font;
            Invalidate();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            colorDialog1.ShowDialog();
            label1.ForeColor = colorDialog1.Color;
            Invalidate();
        }

Henry Minute wrote:

For controls with no user interaction (Labels for example) it does not matter what you do with TabIndex since it is ignored

String[] strArray = null;
Int strArrayLength ;

//When the length is known
strArray = new string[strArrayLength];

String[] strArray = new String[];
Array.Resize(ref strArray, 3);

msomar wrote:

Timeout expired.

prithaa wrote:

saying the Interop file doesnt exist.I