Taskbar Button Not Updated After Exiting Command Prompt (129220)
The information in this article applies to:
This article was previously published under Q129220 SYMPTOMS
When you run an MS-DOS-based program in Windows 95 and then start a command
prompt from that program, the taskbar button for that program may not be
updated properly when you exit the command prompt. That is, the taskbar
button may still show that the command prompt is the active program even
though you have exited the command prompt and returned to the MS-DOS-based
program.
CAUSE
The MS-DOS-based program has moved its program segment prefix (PSP). (The
PSP is a small data structure that Windows 95 uses to determine the program
name that should be displayed on the taskbar button.) When the PSP is
moved, Windows 95 cannot find it and cannot accurately report the active
program on the taskbar button.
RESOLUTION
Quit and restart the MS-DOS-based program to update the taskbar button for
that program.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows 95. We
are researching this problem and will post new information here in the
Microsoft Knowledge Base as it becomes available.
MORE INFORMATION
When you start a command prompt from an MS-DOS-based program, a new
instance of the command interpreter (COMMAND.COM) is started, and the
taskbar button for the original program is updated to reflect the fact that
COMMAND.COM is the active program (Windows 95 gets this information from
the PSP for the new instance of COMMAND.COM). When you exit the command
prompt, Windows 95 attempts to update the taskbar button with information
from the PSP for the original MS-DOS-based program. If the PSP cannot be
found, the taskbar button is not updated and still indicates that
COMMAND.COM is the active program.
| Modification Type: | Major | Last Reviewed: | 12/17/2000 |
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| Keywords: | KB129220 |
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