DrawLine

I am trying to draw a line on a form with the following code, but I get a strange error....

Code:

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private void button2_Click(object sender, System.EventArgs e)
                {
                        Graphics g;
                        Pen aPen = new Pen(Brushes.Black, 2);
                        g.DrawLine(aPen, 100,100,300,300);
                       
                       
                }

---

Error:
C:\Documents and Settings\carsten\My Documents\Visual Studio Projects\sharp_test_obel\Form1.cs(228): Use of unassigned local variable 'g'

What am I doing wrong?

You are not creatning the graphics object

try

Code:

---

Graphics g = this.CreateGraphics();
 Pen aPen = new Pen(Brushes.Black, 2);
 g.DrawLine(aPen, 100,100,300,300);

---

Thanks :) That did the job
How would I do it in a picturebox?

use the same method just create the graphics from the picturebox instead, as far as i know it can be done with any control

Code:

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Graphics g;
 g = this.pictureBox1.CreateGraphics();
 Pen aPen = new Pen(Brushes.Black, 2);
 g.DrawLine(aPen, 100,100,300,300);

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thanks :thumb: :)