<p>How can I display a tooltip over a button using <a href="http://en.wikipedia.org/wiki/Windows_Forms" rel="noreferrer">Windows Forms</a>?</p>

Sure, just handle the mousehover event and tell it to display a tool tip.
t is a tooltip defined either in the globals or in the constructor using:
```
```
ToolTip t = new ToolTip();
```
```
then the event handler:
```
```
private void control_MouseHover(object sender, EventArgs e)
{
  t.Show("Text", (Control)sender);
}
```
```