title: Get Displayed Position of DataGridView Row
body: <p>The easiest way I see to explain what I need is via example.</p>
  
  <p>Suppose I have a DataGridView with 20 rows of data.  The DGV is sized to show 10 rows at a time.  It is scrolled to show rows 4-13.  Row 7 is selected.  What I need is a way to get that Row7 is the 4th displayed row.</p>