DrawLine

[CyberCarsten]

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

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?

[john tindell]

You are not creatning the graphics object

try

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

[CyberCarsten]

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

[john tindell]

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

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

[CyberCarsten]

thanks