title: DataGridView overrides my custom row painting
body: <p>I'm following the example on MSDN for using the RowPrePaint event to custom paint my rows.</p>
  
  <p><a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.rowprepaint(v=vs.110).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.rowprepaint(v=vs.110).aspx</a></p>
  
  <p>I only want to custom paint some rows, not all. I also have an alternating row style applied.</p>
  
  <p>When I stepped through the debugger I was able to watch the program paint the row according to the example in MSDN (a subtle gradient), but as soon as the RowPrePaint event handler returned the program repainted the row according to its default styles.</p>
  
  <p>How can I keep my custom painting style?</p>