Override Paint Method for a PaintBox

Thanks for the reply Mike - and I have now changed to it painting on the form.  However, my question still remains - how do I override the OnPaint method so that it will draw on creation of the object and then whenever it's position changes?  I don't want to have to have the object carry a graphics property with it, so how do I go about getting the form's surface for the object to draw on?
The object is in it's own class under the same namespace.  It has a method to update it's position, and what I want to be able to do, is when that position is altered, fire a paint event from within the object's move method.  (And also in it's constructor on creation).

My thought was to create an event handler and event args and set it up that way.  But when I try and do this, it complains that the eventhandler doesn't have the right parameters - because I'm using my own eventargs and not System.Windows.Forms.PaintEventArgs.  So, this is roughly how it looks :

PaintCode.cs -

public class ObjectPaintEventArgs : EventArgs
{
int left;
int top;
int right;
int bottom;

public ObjectPaintEventArgs(Rectangle r, System.Windows.Forms.PaintEventArgs e)
{
left = r.Left;
top = r.Top;
right = r.Right;
bottom = r.Bottom;
}
}

public delegate void ObjectPaintEventHandler(object sender, ObjectPaintEventArgs e);

agent.cs -

public event ObjectPaintEventHandler paintAgent;

public Agent(int x, int y, int village)
{...

ObjectPaintEventArgs paintAgentEventArgs =
  new ObjectPaintEventArgs(new Rectangle(x, y, 2, 2));

paintAgent += new ObjectPaintEventHandler(MainForm_Paint);

paintAgent(this, paintAgentEventArgs);
...
}

public override void MainForm_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{...
}