Programalama > C#

using System;
using System.Windows.Forms;
using System.Drawing;

class MyForm : Form
{
    MyForm ()
    {
        Text = "Clock";
        SetStyle (ControlStyles.ResizeRedraw, true);
    }

    protected override void OnPaint (PaintEventArgs e)
    {
        SolidBrush red = new SolidBrush (Color.Red);
        SolidBrush white = new SolidBrush (Color.White);
        SolidBrush blue = new SolidBrush (Color.Blue);

        // Initialize the transformation matrix
        InitializeTransform (e.Graphics);

        // Draw squares denoting hours on the clock face
        for (int i=0; i<12; i++) {        
            e.Graphics.RotateTransform (30.0f);
            e.Graphics.FillRectangle (white, 85, -5, 10, 10);
        }

        // Get the current time
        DateTime now = DateTime.Now;
        int minute = now.Minute;
        int hour = now.Hour % 12;

        // Reinitialize the transformation matrix
        InitializeTransform (e.Graphics);

        // Draw the hour hand
        e.Graphics.RotateTransform ((hour * 30) + (minute / 2));
        DrawHand (e.Graphics, blue, 40);

        // Reinitialize the transformation matrix
        InitializeTransform (e.Graphics);

        // Draw the minute hand
        e.Graphics.RotateTransform (minute * 6);
        DrawHand (e.Graphics, red, 80);

        // Dispose of the brushes
        red.Dispose ();
        white.Dispose ();
        blue.Dispose ();
    }

    void DrawHand (Graphics g, Brush brush, int length)
    {
        // Draw a hand that points straight up, and let
        // RotateTransform put it in the proper orientation
        Point[] points = new Point[4];
        points[0].X = 0;
        points[0].Y = -length;
        points[1].X = -12;
        points[1].Y = 0;
        points[2].X = 0;
        points[2].Y = 12;
        points[3].X = 12;
        points[3].Y = 0;

        g.FillPolygon (brush, points);
    }

    void InitializeTransform (Graphics g)
    {
        // Apply transforms that move the origin to the center
        // of the form and scale all output to fit the form's width
        // or height
        g.ResetTransform ();
        g.TranslateTransform (ClientSize.Width / 2,
            ClientSize.Height / 2);
        float scale = System.Math.Min (ClientSize.Width,
            ClientSize.Height) / 200.0f;
        g.ScaleTransform (scale, scale);
    }

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