Your Paint method is called for every cell.
Just draw your background in there. Everything you
need is supplied in the arguments

Protected Overloads Overrides Sub Paint(ByVal g As System.Drawing.Graphics,
_
           ByVal bounds As System.Drawing.Rectangle, _
           ByVal source As System.Windows.Forms.CurrencyManager, _
           ByVal rowNum As Integer, _
           ByVal backBrush As System.Drawing.Brush, _
           ByVal foreBrush As System.Drawing.Brush, _
           ByVal alignToRight As Boolean)

   If noCheckbox Then
       g.FillRectangle(backBrush, bounds)
   Else
       MyBase.Paint(g, bounds, source, rowNum, backBrush, foreBrush,
alignToRight)
   End If

End Sub

   /claes