WLC_Programming Knowledge

 //Create Graphics Object on Panel
Graphics gr = this.CreateGraphics();

//Define Graphics Quality
gr.SmoothingMode = SmoothingMode.HighQuality;

//Change Custom Start Point of Graphics
gr.TranslateTransform(100, ClientRectangle.Height / 2);

//Refresh Graphic's BG Color
gr.Clear(Color.Silver);

 //Create Pen Object Specified Color and Width
            using (Pen p = new Pen(Color.Gray, 1))
            {
                //Create X and Y axes
                gr.DrawLine(p, 0, 0, 300, -300);
                gr.DrawLine(p, 0, 0, 300, 300);
                gr.DrawLine(p, 150, -150, 450, 150);
                gr.DrawLine(p, 150, 150, 450, -150);
            }
 

 //Create Fist Arrow with Line Graphics
            int a1 = 150;
            int b1 = -150;
            int a2 = 10;              
            for (int b2 = 10; b2 <= 150; b2 += 10)
            {
                gr.DrawLine(Pens.Gray, a1, b1, a2, b2);
                a1 -= 10;
                b1 += 10;
                a2 += 10;
            }

            //Create Back Arrow with Line Graphics
            int i1 = 150;
            int j1 = -150;
            int i2 = 290;
            for (int j2 = 10; j2 <= 150; j2 += 10)
            {
                gr.DrawLine(Pens.Gray, i1, j1, i2, j2);
                i1 += 10;
                j1 += 10;
                i2 -= 10;
            }

            //Create Second Arrow with Line Graphics
            int c1 = 300;
            int d1 = -300;
            int c2 = 150;            
            for (int d2 = -150; d2 <= 0; d2 += 10)
            {
                gr.DrawLine(Pens.Gray, c1, d1, c2, d2);
                c1 -= 10;
                d1 += 10;
                c2 += 10;
            }

            //Create Third Arrow with Line Graphics
            int e1 = 300;
            int f1 = 0;
            int e2 = 150;
            for (int f2 = 150; f2 <= 300; f2 += 10)
            {
                gr.DrawLine(Pens.Gray, e1, f1, e2, f2);
                e1 -= 10;
                f1 += 10;
                e2 += 10;
            }

            //Create Last Arrow with Line Graphics
            int g1 = 450;
            int h1 = -150;
            int g2 = 310;
            for (int h2 = 10; h2 <= 150; h2 += 10)
            {
                gr.DrawLine(Pens.Gray, g1, h1, g2, h2);
                g1 -= 10;
                h1 += 10;
                g2 += 10;
            }