Q43260: Vertical Scroll Inactive with MODE CO40 and Dual Monitors

Article: Q43260
Product(s): See article
Version(s): 2.x
Operating System(s): MS-DOS
Keyword(s): ENDUSER | S_C buglist2.20 | mspl13_basic
Last Modified: 18-APR-1989

While debugging a program using Microsoft CodeView and dual monitors,
the vertical scroll bar is disabled when the video mode is set to
40-line color text. This occurs if the mode is set either at the
command line

   MODE CO40

or from within a program as follows:

   _setvideomode(_TEXTC40);

The scroll bar remains inactive until the mode is changed. This
problem does not occur on a single monitor system or in any other
video modes.

Microsoft has confirmed this to be a problem in Version 2.20. We are
researching the problem and will post new information as it becomes
available.

The following program demonstrates the problem:

#include <graph.h>

void main (void)
{
  _setvideomode(_TEXTC40);
  _setvideomode(DEFAULTMODE);
}

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