Want Mouse Coordinates To Be "Translated" To My Coordinates

Question

Hi,
 The following code below displays the mouse coordinates alongside the cursor.
 My problem is this-- I my WinForm displays an XY coordinate graph. I need the
 origin to display (0, 0) i.e "my coordinates" which which appear in screen coords
 as (210, 210).

 What is the best way to accomplish this? 

 I tried Transform but I can't seem to pass information between a Rect to a Region, or somehow get the Transformed coordinates to change what the mouse is doing.

 I would like any way to do this. It doesn't have to use Transform.

 Thanks a lot in advance. Code is below.

 


////////////////////////////////////////////////////////////////////
 protected override void OnMouseMove(MouseEventArgs e)
  {
   // TODO:  Add Form1.OnMouseMove implementation
   base.OnMouseMove (e)
   mousePoints = new Point(e.X, e.Y);
   Invalidate(); 
  }
 
  protected override void OnPaint(PaintEventArgs e)
  {
   // TODO:  Add Form1.OnPaint implementation
   base.OnPaint (e);
   Point screen = PointToScreen(mousePoints);
   string location = screen.ToString();
   e.Graphics.DrawString(location,
   e.Graphics.DrawString("   " + (screen), new Font("Arial", 10, FontStyle.Bold),
   SystemBrushes.ControlText,(PointF)mousePoints);
  } 
////////////////////////////////////////////////////////////////