title: TreeNode mouse hover tooltip not showing up
body: <p>I am trying to show a tooltip when mouse hovers on a treeview node. But the tooltip is not showing up.</p>
  
  <p>This is my code:</p>
  
  <pre><code>private void treeView1_MouseHover(object sender, EventArgs e)
  {
      toolTip1.RemoveAll();
  
      TreeNode selNode = (TreeNode)treeView1.GetNodeAt(Cursor.Position);
  
      if (selNode != null)
      {
          if (selNode.Tag != null)
          {
              Product selProduct = selNode.Tag as Product;
  
              if (selProduct != null)
              {
                  toolTip1.SetToolTip(treeView1, selProduct.ProductName + "\n" + selProduct.ProductCategory.ToString());
              }
          }
      }
  }
  </code></pre>
  
  <p>What should I check for?</p>