C sharp - control para dibujar graficos

public void DrawLine(int Ax,int Ay,int Bx, int By)

		 {

				Pen myPen = new Pen(System.Drawing.Color.Red);

				Graphics CompGraphics;

				CompGraphics = this.CreateGraphics();

				CompGraphics.DrawLine(myPen, Ax, Ay, Bx, By);

				myPen.Dispose();

				CompGraphics.Dispose();

	        }

public void PaintEffect()

	  {

				Bitmap myBitmap  = new Bitmap(Width,Height);

				//Bitmap myBitmap  = new Bitmap(200, 200);//Creo una imagen y luego creo un manejador de la parte grafica

				Graphics flagGraphics = Graphics.FromImage(myBitmap ); //manejador de la parte grafica del bitmap

				int red = 0;

				int white = 11;

					while (white <= 100) {

						flagGraphics.FillRectangle(Brushes.Red, 0, red, 200,10);

						flagGraphics.FillRectangle(Brushes.White, 0, white, 200, 10);

						red += 20;white += 20;

					}

				Graphics CompGraphics = this.CreateGraphics();

			    CompGraphics.DrawImage(myBitmap,0,0); 	// Draw image to bitmap		

			    CompGraphics.Dispose();

				flagGraphics.Dispose();