Question

Any suggestions how to create a line by clicking two new points then draw a line between them?
I am trying to create a distance tool like the one in adobe acrobat.

Image Example

Answer 1

Problem Solved!

EDIT:
Here’s the code:

private Point p1, p2;
List<Point> p1List = new List<Point>();
List<Point> p2List = new List<Point>();

    private void Panel1_MouseDown(object sender, MouseEventArgs e)
    {
        if (p1.X == 0)
        {
            p1.X = e.X;
            p1.Y = e.Y;
        }
        else
        {
            p2.X = e.X;
            p2.Y = e.Y;

            p1List.Add(p1);
            p2List.Add(p2);

            Invalidate();
            p1.X = 0;
        }
    }

    private void Panel1_Paint(object sender, PaintEventArgs e)
    {
        using(var p = new Pen(Color.Blue, 4))
        {
            for(int x = 0; x<p1List.Count; x++){
                e.Graphics.DrawLine(p, p1List[x], p2List[x]);
            }
        }
    }