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 Returns an ASCII character code or color code from the screen character
 location specified; not available when forms are showing. Use the SCREEN
 object with forms. See: ◄SCREEN Object►
 
    SCREEN (line%, column% [,colorflag%])
 
    ■ line%         Character location; integer expression whose valid
                    range depends on the number of lines on the screen
 
    ■ column%       Character location; integer expression with a value
                    between 1 and 80, inclusive
 
    ■ colorflag%    Numeric expression that determines which information
                    is returned:
 
                    Expression         Return Value
                    ═════════════      ═════════════════════════════════════
                    Not used or 0      ASCII character code
                    1                  Foreground color code
 
 See Also
    ◄ASCII Character Codes►            ◄COLOR Statement►
    ◄Graphics Command Summary►         ◄SCREEN Object►
    ◄SCREEN Statement►