C#

v17.poornima wrote:

he user may start drawing from anywhere with any angle. So using the draw rectangle i cannot draw that.

private Point startPoint = new Point(0,0);
 private Point endPoint = new Point(0,0);
 private bool drawing = false;
 private void panel1_MouseDown(object sender, MouseEventArgs e)
     {
     startPoint = e.Location;
     endPoint = e.Location;
     panel1.Invalidate();
     drawing = true;
     }

 private void panel1_MouseMove(object sender, MouseEventArgs e)
     {
     if (drawing)
         {
         endPoint = e.Location;
         panel1.Invalidate();
         }
     }

 private void panel1_MouseUp(object sender, MouseEventArgs e)
     {
     drawing = false;
     }

 private void panel1_Paint(object sender, PaintEventArgs e)
     {
     if (!((startPoint.X == endPoint.X) && (startPoint.Y == endPoint.Y)))
         {
         Rectangle r = new Rectangle(startPoint.X, startPoint.Y, endPoint.X - startPoint.X, endPoint.Y - startPoint.Y);
         e.Graphics.DrawRectangle(Pens.Black, r);
         }
     }

John Simmons / outlaw programmer wrote:

Many of the people that post here don't care, or are completely incapable of posting a correctly phrased question.

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