Q40369: NUM LOCK On; ALT+BACKSPACE Fails on IBM PS/2 Model 50 and 60

Article: Q40369
Product(s): See article
Version(s): 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | buglist4.50 SR# S890103-87 ptm235 | mspl13_basic
Last Modified: 8-MAR-1989

When Microsoft QuickBASIC Version 4.50 is running on an IBM PS/2 Model
50 or 60, the following key sequences fail if the NUM LOCK key is on:

1. ALT+BACKSPACE fails to UNDO editing (i.e., pressing the BACKSPACE
   key while holding down the ALT key).

2. ALT+[-] or ALT+[+] fails to size the window (i.e., pressing "+" or
   "-" while holding down the ALT key).

If the NUM LOCK key is off, the above key strokes perform as
documented.

Microsoft has confirmed this to be a problem in Version 4.50. We are
researching this problem and will post new information as it becomes
available.