Q27406: LINE (0,0)-(12231,12230) Causes Line Coordinates to Overflow

Article: Q27406
Product(s): See article
Version(s): 4.00 4.00b 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | B_BasicCom buglist4.00 buglist4.00b buglist4.50 | mspl13_basic
Last Modified: 17-JAN-1990

A LINE graphics statement gives an Overflow Error with certain large
(but valid) values for coordinates. The first two LINE statements of
the example below work correctly; the third LINE statement gives the
overflow error.

This problem occurs both in the QB.EXE editor environment and as an
.EXE file.

Microsoft has confirmed this to be a problem in QuickBASIC Versions
4.00, 4.00b, and 4.50, and in Microsoft BASIC Compiler Versions 6.00
and 6.00b for MS-DOS and OS/2 (buglist6.00, buglist6.00b). This
problem was corrected in Microsoft BASIC Professional Development
System (PDS) Version 7.00 for MS-DOS and OS/2 (fixlist7.00).

The code example is as follows:

   screen 2
   line (0,0)-(12230, 12230)
   line (0,0)-(12231, 12231)
   line (0,0)-(12231, 12230)

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