QBasic 1.1: POINT Function

Explanation

POINT Function

Returns the current graphics cursor coordinates or the color attribute of a specified pixel.

Worth knowing

Useful and cross-version information about the programming environments of QBasic, QuickBasic and Visual Basic for DOS.

ASCII Code Tables
Keyboard Scan Codes
Syntax Conventions
Screen Modes
Color Attributes
Error Codes

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Syntax

POINT {(n%) | (x%,y%)}

Description / Parameter(s)

(n%)

Indicates the type of coordinate to return:

n%	Returns
0	The current viewport x coordinate
1	The current viewport y coordinate
2	The current window x coordinate
3	The current window y coordinate

(x%,y%)

The coordinates of the pixel that POINT checks for color.
If the coordinates are outside the current viewport, POINT returns -1.

Example


'This example requires a color graphics adapter.
SCREEN 1
LINE (0, 0)-(100, 100), 2
LOCATE 14, 1
FOR y% = 1 TO 10
  FOR x% = 1 TO 10
    PRINT POINT(x%, y%);
  NEXT x%
  PRINT
NEXT y%