The DOWN key adjusts the value by a small step.
The UP key adjusts the value by a small step.
The PAGE_DOWN key, and Ctrl+DOWN adjusts the value by a large step.
The PAGE_UP key, and Ctrl+UP adjusts the value by a large step.
The Ctrl+END key, sets the value to its maximum value.
The Ctrl+HOME key, sets the value to its minimum value.
The ENTER key updates the spinner's value, based on the text.
Adds a single Command to the map (commands).