using System;
  using System.Drawing;
  using System.Drawing.Drawing2D;
  using System.Collections;
  using System.ComponentModel;
  using System.Windows.Forms;
  using System.Data;
  using System.Drawing.Imaging;

  public class Form1 : System.Windows.Forms.Form
  {
    public Form1()
    {
      InitializeComponent();
    }
    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "";
      this.Resize += new System.EventHandler(this.Form1_Resize);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.Form1_Paint);

    }
    static void Main() 
    {
      Application.Run(new Form1());
    }

    private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {      
      Graphics g = e.Graphics;
      g.FillRectangle(Brushes.White, this.ClientRectangle);

      GraphicsPath gp = new GraphicsPath();

      // Create a figure
      gp.AddLine(10, 10, 10, 50);
      gp.AddBezier(10, 50, 130, 55, 25, 70, 30, 70);
      gp.AddLine(30, 70, 60, 70);
      gp.AddBezier(60, 70, 555, 70, 90, 55, 90, 50);
      gp.AddLine(90, 50, 90, 30);

      // Create another figure
      gp.StartFigure();
      gp.AddLine(60, 110, 40, 160);
      gp.AddLine(40, 160, 60, 180);

      g.DrawPath(Pens.Black, gp);

      gp.Dispose();
    }

    private void Form1_Resize(object sender, System.EventArgs e)
    {
      Invalidate();
    }
  }

           
          

   


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;

public class Form1 : Form
{
        GraphicsPath path;

      public Form1() {
            InitializeComponent();
            
      }
    private void GraphicsPathHit_Paint(object sender, PaintEventArgs e)
    {
      e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
      path = new GraphicsPath();
      path.StartFigure();
      path.AddArc(10, 10, 100, 100, 20, 50);
      path.AddLine(20, 50, 70, 230);
      path.CloseFigure();
      path.AddEllipse(120, 50, 80, 80);
      e.Graphics.FillPath(Brushes.White, path);
      e.Graphics.DrawPath(Pens.Black, path);
    }

    private void GraphicsPathHit_MouseDown(object sender, MouseEventArgs e)
    {
      if (path.IsVisible(e.X, e.Y))
      {
        MessageBox.Show("You clicked inside the figure.");
      }
    }

    private void InitializeComponent()
    {
      this.SuspendLayout();
      // 
      // GraphicsPathHit
      // 
      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
      this.ClientSize = new System.Drawing.Size(292, 266);
      this.Name = "GraphicsPathHit";
      this.Text = "GraphicsPathHit";
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.GraphicsPathHit_Paint);
      this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.GraphicsPathHit_MouseDown);
      this.ResumeLayout(false);

    }
      [STAThread]
      static void Main()
      {
        Application.EnableVisualStyles();
        Application.Run(new Form1());
      }

}


           
          

   
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;

using System.Text;
using System.Windows.Forms;

public class Form1 : Form {

    protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;
    g.FillRectangle(Brushes.White, this.ClientRectangle);
    GraphicsPath gp = new GraphicsPath();
    
    gp.AddRectangle(new Rectangle(10, 50, 80, 20));

    gp.AddEllipse(50, 10, 20, 80);
    g.DrawPath(Pens.Black, gp);
    gp.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

    

   
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Text;
using System.Windows.Forms;

public class Form1 : Form {

    protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;
    g.FillRectangle(Brushes.White, this.ClientRectangle);
    GraphicsPath gp = new GraphicsPath();
    gp.AddLine(10, 10, 10, 50);
    gp.AddBezier(10, 50, 10, 55, 25, 70, 30, 70);
    gp.AddLine(30, 70, 60, 70);
    gp.StartFigure();
    gp.AddLine(60, 110, 40, 160);

    gp.CloseAllFigures();

    g.DrawPath(Pens.Black, gp);
    gp.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

    

   
 
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Text;
using System.Windows.Forms;

public class Form1 : Form {

    protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;
    g.FillRectangle(Brushes.White, this.ClientRectangle);
    GraphicsPath gp = new GraphicsPath();

    gp.AddLine(10, 10, 10, 50);
    gp.AddBezier(10, 50, 10, 55, 25, 70, 30, 70);

    gp.StartFigure();
    gp.AddLine(60, 110, 40, 160);

    g.DrawPath(Pens.Black, gp);
    gp.Dispose();
    }
    public static void Main() {
        Application.Run(new Form1());
    }
}

    

   


  using System;
  using System.Drawing;
  using System.Collections;
  using System.ComponentModel;
  using System.Windows.Forms;
  using System.Data;

  public class MainForm : System.Windows.Forms.Form
  {
    private System.ComponentModel.Container components;
    private ArrayList myPts = new ArrayList();

    public MainForm()
    {
      InitializeComponent();
      CenterToScreen();
      this.Text = "click on me";
    }
    protected override void Dispose( bool disposing )
    {
      if( disposing )
      {
        if (components != null) 
        {
          components.Dispose();
        }
      }
      base.Dispose( disposing );
    }

    private void InitializeComponent()
    {
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(292, 273);
      this.Text = "Form1";
      this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.MainForm_MouseDown);
      this.Paint += new System.Windows.Forms.PaintEventHandler(this.MainForm_Paint);

    }
    static void Main() 
    {
      Application.Run(new MainForm());
    }

    private void MainForm_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
    {
      Graphics g = Graphics.FromHwnd(this.Handle);

      // Add to points collection.
      myPts.Add(new Point(e.X, e.Y));
      Invalidate();
    }

    private void MainForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
    {
      Graphics g = e.Graphics;
      foreach(Point p in myPts)
        g.DrawEllipse(new Pen(Color.Green), p.X, p.Y, 10, 10);
    }
  }

           
          

   

/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald

Publisher: Apress
ISBN: 1590590457
*/

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace DrawingSquares
{
    /// <summary>
    /// Summary description for DrawingSquares.
    /// </summary>
    public class DrawingSquares : System.Windows.Forms.Form
    {
        internal System.Windows.Forms.ContextMenu mnuForm;
        internal System.Windows.Forms.MenuItem mnuNewSquare;
        internal System.Windows.Forms.ContextMenu mnuLabel;
        internal System.Windows.Forms.MenuItem mnuColorChange;
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;

        public DrawingSquares()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.mnuForm = new System.Windows.Forms.ContextMenu();
            this.mnuNewSquare = new System.Windows.Forms.MenuItem();
            this.mnuLabel = new System.Windows.Forms.ContextMenu();
            this.mnuColorChange = new System.Windows.Forms.MenuItem();
            // 
            // mnuForm
            // 
            this.mnuForm.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                    this.mnuNewSquare});
            // 
            // mnuNewSquare
            // 
            this.mnuNewSquare.Index = 0;
            this.mnuNewSquare.Text = "Create New Square";
            this.mnuNewSquare.Click += new System.EventHandler(this.mnuNewSquare_Click);
            // 
            // mnuLabel
            // 
            this.mnuLabel.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                                                                     this.mnuColorChange});
            // 
            // mnuColorChange
            // 
            this.mnuColorChange.Index = 0;
            this.mnuColorChange.Text = "Change Color";
            this.mnuColorChange.Click += new System.EventHandler(this.mnuColorChange_Click);
            // 
            // DrawingSquares
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(628, 426);
            this.ContextMenu = this.mnuForm;
            this.Name = "DrawingSquares";
            this.Text = "DrawingSquares";
            this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.DrawingSquares_MouseDown);

        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new DrawingSquares());
        }

        private void mnuNewSquare_Click(object sender, System.EventArgs e)
        {
            // Create and configure the "square".
            Label newLabel = new Label();
            newLabel.Size = new Size(40, 40);
            newLabel.BorderStyle = BorderStyle.FixedSingle;

            // To determine where to place the label, you need to convert the 
            // current screen-based mouse coordinates into relative form coordinates.
            newLabel.Location = this.PointToClient(Control.MousePosition);

            // Attach a context menu to the label.
            newLabel.ContextMenu = mnuLabel;

            // Connect the label to all its event handlers.
            newLabel.MouseDown += new MouseEventHandler(lbl_MouseDown);
            newLabel.MouseMove += new MouseEventHandler(lbl_MouseMove);
            newLabel.MouseUp += new MouseEventHandler(lbl_MouseUp);

            // Add the label to the form.
            this.Controls.Add(newLabel);

        }


        // Keep track of when fake drag or resize mode is enabled.
        private bool isDragging = false;
        private bool isResizing = false;

        // Store the location where the user clicked on the control.
        private int clickOffsetX, clickOffsetY;

        private void lbl_MouseDown(object sender,
            System.Windows.Forms.MouseEventArgs e)
        {
            // Retrieve a reference to the active label.
            Control currentCtrl;
            currentCtrl = (Control)sender;

            if (e.Button == MouseButtons.Right)
            {
                // Show the context menu.
                currentCtrl.ContextMenu.Show(currentCtrl, new Point(e.X, e.Y));
            }
            else if (e.Button == MouseButtons.Left)
            {
                clickOffsetX = e.X;
                clickOffsetY = e.Y;

                if ((e.X + 5) > currentCtrl.Width &amp;&amp; (e.Y + 5) > currentCtrl.Height)
                {
                    // The mouse pointer is in the bottom right corner,
                    // so resizing mode is appropriate.
                    isResizing = true;
                }
                else
                {
                    // The mouse is somewhere else, so dragging mode is
                    // appropriate.
                    isDragging = true;
                }
            }
        }

        private void lbl_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            // Retrieve a reference to the active label.
            Control currentCtrl;
            currentCtrl = (Control)sender;

            if (isDragging)
            {
                // Move the control.
                currentCtrl.Left += e.X - clickOffsetX;
                currentCtrl.Top += e.Y  - clickOffsetY;
            }
            else if (isResizing)
            {
                // Resize the control.
                currentCtrl.Width = e.X;
                currentCtrl.Height = e.Y;
            }
            else
            {
                // Change the pointer if the mouse is in the bottom corner.
                if ((e.X + 5) > currentCtrl.Width &amp;&amp; (e.Y + 5) > currentCtrl.Height)
                {
                    currentCtrl.Cursor = Cursors.SizeNWSE;
                }
                else
                {
                    currentCtrl.Cursor = Cursors.Arrow;
                }
            }
        }
        private void lbl_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            isDragging = false;
            isResizing = false;
        }

        private void mnuColorChange_Click(object sender, System.EventArgs e)
        {
            // Show color dialog.
            ColorDialog dlgColor = new ColorDialog();
            dlgColor.ShowDialog();

            // Change label background.
            mnuLabel.SourceControl.BackColor = dlgColor.Color;

        }

        private void DrawingSquares_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                this.ContextMenu.Show(this, new Point(e.X, e.Y));
            }
        
        }

    }
}