This is TboxCalc, the Acorn demonstration of a how a simple application can be built, but this version actually works!

The several things have been modified from the original Res file to make it more efficient, and it is implemented with a BASIC !RunImage using Basalt Toolbox keywords.

Note that it uses the Reporter module for error reporting.

The Calculator window is opened as transient, so it disappears like a menu with a mouse click or Escape.

The keyboard keys act as shortcuts, with Backspace and Delete as Clear, and Return and Enter as Equals.

Note that the Toolbox delivers double events from the numeric keypad for the keyboard shortcuts, which is a bug, so this program used the KeyPressed event.

The Original C source is included for a comparison.
