# Predefined Constants

## Table of Contents

- Newt form exit reasons
- Newt colorsets
- Newt argument flags
- Newt Flags Sense
- Newt Components Flags
- File Descriptor Flags
- Checkbox Tree Flags
- Entry Flags
- Listbox Flags
- Textbox Flags
- Form Flags
- Newt Keys
- Newt Anchors
- Grid Flags

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.