title: Why is Tooltip not displaying?
body: <p>I added a Tooltip to my app.</p>
  
  <p>In the control (a DataGridView) where I want it to display the hint/tooltip, I added verbiage to the "Tooltip on " property. But my verbiage does not display (nothing does, to be precise).  </p>
  
  <p>Why?</p>
  
  <p>I added verbiage to a related button, and it works just fine. Maybe the DGV itself cannot deal with tooltips?</p>
  
  <p><strong>Added</strong></p>
  
  <p>Here is a complete sample that demonstrates the problem</p>
  
  <pre><code>using System;
  using System.Drawing;
  using System.Windows.Forms;
  
  static class Program
  {
      [STAThread]
      static void Main()
      {
          Application.EnableVisualStyles();
          Application.SetCompatibleTextRenderingDefault(false);
  
          var form = new Form {
              Controls = {
                  new Button { Name = "button", Location = new Point(10, 10) },
                  new DataGridView { Name = "dgv", Location = new Point(10, 50) },
              },
          };
  
          var tooltip = new ToolTip();
          tooltip.SetToolTip(form.Controls["button"], "Button Tooltip");
          tooltip.SetToolTip(form.Controls["dgv"], "DGV Tooltip");
  
          Application.Run(form);
          GC.KeepAlive(tooltip); // it's cheaper than implementing IContainer on the form for this demo
      }
  }
  </code></pre>