# Sandbox.UI.PopupButton

A button that opens a [Sandbox.UI.PopupButton.Popup](/api/Sandbox.UI.PopupButton/Popup) panel.
Useless on its own - you need to implement Open

- Kind: class
- Namespace: `Sandbox.UI`
- Assembly: `Sandbox.Engine`
- Inherits: [Sandbox.UI.Button](/api/Sandbox.UI.Button)
- Modifiers: abstract

## Constructors

- [`PopupButton`](/api/Sandbox.UI.PopupButton/.ctor)

## Methods

- [`Open`](/api/Sandbox.UI.PopupButton/Open): Open a popup. You should set [Sandbox.UI.PopupButton.Popup](/api/Sandbox.UI.PopupButton/Popup) here.
- [`Tick`](/api/Sandbox.UI.PopupButton/Tick)