Talk:Sudoku/@comment-9531161-20140523205242/@comment-5334617-20140523214708

From the line ZM=8, I'm assuming your zoom factor is 8. Coincidentally, a character is exactly 8 pixels a side. Have you considered using characters, like CHR$(151)? It means you won't be able to easily change the zoom factor by simply adjusting a variable, but if you're comfortable fixing it at 8, I imagine printing a character will be faster than drawing a graphics box.