Q26895: Using Joystick, STRIG(1) Incorrectly Returns 1, Not -1

Article: Q26895
Product(s): See article
Version(s): 4.00 4.00b
Operating System(s): MS-DOS
Keyword(s): ENDUSER | buglist4.00 buglist4.00b fixlist4.50 B_BasicCom | mspl13_basic
Last Modified: 18-OCT-1989

The joystick buttons are not recognized in the program shown below.
The program incorrectly returns a 1 instead of a -1 when the button is
pressed in programs compiled with QuickBASIC Versions 4.00 and 4.00b
and with Microsoft BASIC Compiler Versions 6.00 and 6.00b for MS-DOS
(buglist6.00, buglist6.00b).

This problem was corrected in Microsoft QuickBASIC Version 4.50.

The problem does not occur in QuickBASIC Version 3.00, which correctly
returns -1.

Under GW-BASIC Version 3.20, the program also works correctly and
returns -1.

The following is a code example of this problem:

   lp:
   button= 0
   button = strig(1)
   print button
   goto lp

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