Let's say that I have a win form app and I have a picture box called pictureBox1. Then I run the following code:

```
public System.Drawing.Graphics graphics;
public System.Drawing.Pen blackPen = new System.Drawing.Pen(Color.Black, 2);

public void drawVennDiagram()
{
    graphics = pictureBox1.CreateGraphics();
    graphics.DrawEllipse(blackPen, 0, 0, 100, 100);
    graphics.DrawEllipse(blackPen, 55, 0, 100, 100);
}

```

If I call `drawVennDiagram()` , it will draw two circles in `pictureBox1` and the circles overlap just enough to look like a venn diagram.

What I am trying to achieve is as follows:

> 
> * Run Method `A` if the mouse clicks anywhere outside of the venn diagram but in the picturebox.
> * Run Method `B` if the mouse clicks only inside of the first circle.
> * Run Method `C` if the mouse clicks inside of both circles.
> * Run Method `D` if the mouse clicks only inside of the second circle.
> 
> 
> 

So far I have written the code below, which essentially tracks where the cursor clicks, but I have no way of figuring out which parameter (a, b, c, d) the cursor location follows.

```
private void pictureBox1_Click(object sender, EventArgs e)
{
    this.Cursor = new Cursor(Cursor.Current.Handle);
    int xCoordinate = Cursor.Position.X;
    int yCoordinate = Cursor.Position.Y;
}

private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
    int xCoordinate = e.X;
    int yCoordinate = e.Y;
}

```

What is the best way to achieve this?