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   The calculator is a standard component of the applications created with
   dBsee4. It can be popped up, inside every environment or data entry
   session, by pressing the Alt-F1 key, and is designed to operate both
   with the mouse and the keyboard.

   The upper part of the calculator is used for the display. Immediately
   below, the numeric keypad and the ON/C, <-, KEYBOARD and
   OFF button are displayed. The calculator is popped up in ON state.

     . The numeric keypad works like the keypad of a real
       calculator, or by clicking on the keys with the mouse.

     . The ON/C button is used for blanking the display.

     . The <- button serves as the Backspace key, and
       removes the last entered keys.

     . The KEYBOARD button is used for closing the calculator
       and pasting the value displayed into the current Get field.

     . The OFF button is also used for closing the calculator,
       but without pasting the result into the Get.

   For activating the buttons from the keyboard, the associated hot-key must
   be used (O, Back-Space, K and F, respectively).

   The O will clear the display, while the Esc key will close and
   remove the calculator from screen.

   The Shift-F1 display the keys available on the calculator.