BASICBASIC screen utilities

BASIC screen utilities

Screen utilities are used to display formatted menus.

The screen utility consists of a series of BASIC subroutines to handle formatted menus. All data is passed between the subroutines and the main program through a common defined in include dm,bp,includes, screen.inc.

  1. screen.display utility
    The screen.display utility displays a screen and waits for a selection.
  2. screen.erase utility
    The screen.erase utility erases a formatted screen.
  3. screen.init utility
    The screen.init utility initializes the screen common workspace. This call should be done prior to any other call the screen subroutines.
  4. screen.input utility
    The screen.input utility displays a formatted screen and waits for input from a user. Multiple fields can be entered by the user before validation. Type checking is done by the subroutine, and the caller can provide a custom external routine to perform additional controls.

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