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by Jaruzel 2831 days ago
> LINE (x1, y1) - (x2, y2), 5, FB

> Can you remember what it does? (no, it doesn't draw a line; it would, if not for "FB").

Yes. Draws a filled box (FB), from top-left (x1,y1) to bottom right (x2,y2) in Purple (colour 5).

Although thinking about it... I'm pretty sure that the co-ords of 0,0 were bottom left, not top left on DOS based graphic screens, so is quite probably bottom-left to top-right.

Source: One of my first 'paid' jobs was as a QB45 programmer for an accountancy firm in the mid 1990s.