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1993-07-26
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New MSCOMM control available Q101944
Summary:
A new version of the MSCOMM control has been made available in LIB 1 of the
MSBASIC forum on CompuServe. This control fixes a problem where the OnComm
event will not fire when communicating with some 14.4 baud modems.
More Information:
The date,time, size and version number of the MSCOMM.VBX file that
shipped with Visual Basic 3.0 is:
Date: 28-APR-1993
Time: 12:00 a.m.
Size: 34304
Version: 2.0.9000.7
The date, time, size and version number of the updated MSCOMM.VBX file
is as follows:
Date: 12-MAY-1993
Time: 12:21 p.m.
Size: 34816
Version: 2.1.0.1
When using the MSCOMM.VBX provided with Visual Basic version 2.0 or
3.0 to communicate with a 14.4 baud modem, the OnComm event may not
fire. The revised version of the MSCOMM.VBX control available on
CompuServe fixes this problem by introducing a new Notification
property. Since the problem relates to using Windows 3.1 event driven
communications, this new property allows you to use Windows 3.0
polling techniques instead.
The Nofication property is not available at design-time, but you can
get and set its property value at run-time. It's default value of 0
specifies that the control should use Windows 3.0 polling techniques
and a value of 1 specifies that Windows 3.1 event driven
communications should be used. However, it is only recommended that
you set the property value to 1 if you are using the MSCOMM control to
communicate with a modem whose baud rate is lower than 14.4 baud.
Another change that was made is that the default property setting for
the Interval property was changed from 1000 to 55.
To install the new control, copy the updated version into the
WINDOWS\SYSTEM directory on your computer. Also check to make sure
that no other copies of MSCOMM.VBX exist on your system. If you find
an older version of the MSCOMM.VBX file, you should delete it or
rename it.