using System; using System.Drawing; using System.Drawing.Drawing2D; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; 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); Color c1 = Color.FromArgb(100, Color.Blue); Color c2 = Color.FromArgb(50, Color.Green); g.FillEllipse(Brushes.Red, 20, 20, 80, 80); g.FillRectangle(new SolidBrush(c1), 60, 80, 60, 60); Point[] pa = new Point[] { new Point(150, 40), new Point(90, 40), new Point(90, 120)}; g.FillPolygon(new SolidBrush(c2), pa); } private void Form1_Resize(object sender, System.EventArgs e) { Invalidate(); } }