PWB 1.00/1.10 May Not Redraw Screen Correctly with Low Memory

ID Number: Q70917

1.00 1.10

MS-DOS

buglist1.00 buglist1.10

Summary:

When using the Microsoft Programmer's WorkBench (PWB) version 1.00 or

1.10, a low-memory condition may prevent the screen from being

refreshed (redrawn) correctly after a drop-down menu has been used.

This problem occurs only under DOS, and only if PWB is started with a

low amount of available DOS memory (for example, 300K available memory

will cause this problem). When some of the drop-down menus are

selected and then canceled (by pressing ESC), the region that the

drop-down menu occupied on the screen will not be refreshed, and

instead, will remain black.

Using the PGUP (page up) and PGDN (page down) keys will partially

refresh the screen. To force a complete screen update, you can either

maximize and restore the current window (by pressing CTRL+F10 twice)

or you can execute the "meta message" command (by pressing ALT+A,

typing "meta message", and then pressing F7).

To eliminate the problem completely, just free up more DOS memory so

there is more available memory when PWB is started.

Microsoft has confirmed this to be a problem in PWB versions 1.00 and

1.10. We are researching this problem and will post new information

here as it becomes available.