# Summary

Creating Controls

- Rectangles are used when creating controls
- Buttons, check boxes, radio buttons use call-backs
- Labels are used for displaying words
- Fields are for single line input
- Text boxes are for multiple lines of text

Using Check Boxes and Radio Buttons

- Check boxes and radio buttons may be checked or unchecked
- Use the `check` function to check a control
- Use `uncheck` to make it unchecked
- Use `is_checked` to see if a control is checked

Text Fields and Text Boxes

- Use `set_control_text` to change the contents of a textbox or field
- Use `get_control_text` to obtain the contents of a textbox or field
- The initial text can be specified when creating it

Exiting

- Use `exit` to exit the program