How to make this method reusable?

How to make this method reusable?

I have copy pasted this method into two classes. I would rather reuse it
from the first class. This is in a windows forms application.
public void defineMapArea()
{
PictureBox pictureBox1 = new PictureBox();
// Dock the PictureBox to the form and set its background to white.
pictureBox1.Dock = DockStyle.Fill;
pictureBox1.BackColor = Color.White;
// Connect the Paint event of the PictureBox to the event handler method.
pictureBox1.Paint += new
System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);
// Add the PictureBox control to the Form.
this.Controls.Add(pictureBox1);
}
The only thing that needs to change in the method from one class to
another is the "this" keyword which refers to the class, as hovering over
"this" confirms. I thought maybe "this" will just apply to the class
calling the method, but i think it still refers to the class that the
method is defined in. It would be fantastic to simply pass a class as a
parameter, but i'm thinking that doesn't work as i have attempted that.
Any help appreciated. Thanks!