title: DataGridView ToolTipText not showing
body: <p>I have data bound <code>DataGridView</code> in a desktop app with columns that have their <code>ToolTipText</code> property set, yet no tool tip is displayed when I hover over grid view (cells or cell headers).</p>
  
  <p>The <code>ShowCellToolTips</code> property of the grid view is <code>true</code>, and I have verified using break points that it is not changed programmatically before I mouse over.</p>
  
  <p>I have tried creating a <code>CellToolTipTextNeeded</code> event handler to see what the tool tip text was, but the event handler is never called.</p>
  
  <p>Is there anything I have missed?</p>
  
  <p>Thanks,
  Rob</p>
  
  <p><strong>Edit:</strong> We're using framework 2.0.</p>