ToolTip property

The BindTheButton program also includes a ToolTip object that is set to the ToolTip property of the Button. The text appears when the mouse cursor pauses over the button. The ToolTip property is defined by FrameworkElement, so you can attach a tooltip to other elements as well as controls. Like ButtonBase and Windows, ToolTip derives from ContentControl, so you can use formatted text in the ToolTip, and even pictures if you really want to mess with the heads of your users.

If you'd like to see a ToolTip with an image, go back to the ImageTheButton program and insert the following four lines at the end of the constructor:

Button btn = new Button();
btn.Content = "Don't Click Me!";
ToolTip tip = new ToolTip();
tip.Content = img;
btn.ToolTip = tip;