public partial class Form1 : Form
{
private int i;
public Form1()
{
InitializeComponent();
i = 0;
}
private void button1_Click(object sender, EventArgs e)
{
timer1.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
Pen myPen = new Pen(Color.Blue, 1);
Pen myPen2 = new Pen(Color.Red, 1);
System.Drawing.Graphics formGraphics;
formGraphics = this.CreateGraphics();
// Draw the rectangle to the screen before applying the transform.
formGraphics.DrawLine(myPen, 300, 300, 400, 400);
// Create a matrix and rotate it 45 degrees.
Matrix myMatrix = new Matrix();
myMatrix.Rotate(i++, MatrixOrder.Append);
// Draw the rectangle to the screen again after applying the
// transform.
formGraphics.Transform = myMatrix;
formGraphics.DrawLine(myPen2, 300, 300, 400, 400);
}
}
