# Generating event handlers

The GUI Builder generates these event handlers:

Button Handlers

Specifies what action occurs when a button is clicked.

Activation Handlers

Specifies what action occurs to the panel before it displays.

Double-click Handlers

Specifies what action occurs when a user double-clicks an item, such as a list item.

Slider Handlers

Specifies what action occurs when a user changes the position of a slider control.

Menu Handlers

Specifies what action occurs on a context menu.

To generate event handlers, follow these steps:

1. From the Properties window for the PDML file that contains your panels, select true in the Generate Event Handlers value field.
2. From the Properties window of the component that receives the event handler, ensure that you specify the class name or package and class name that is called when the action occurs.

Click here for more things you can do with the GUI Builder.