UPD: New MSCOMM Control Available

 Last reviewed: March 9, 1998
Article ID: Q101944
2.00 3.00 WINDOWS kbprg kbfile

The information in this article applies to:

- Microsoft Visual Basic for Windows, versions 2.0 and 3.0

SUMMARY

A new version of the MSCOMM.VBX control is available. To obtain it, download MSCOMM.EXE, a self-extracting file, on these services:

  • Microsoft's World Wide Web site on the Internet 

          On the www.microsoft.com home page, click the Support icon
      Click Knowledge Base, and select the product

          Enter kbfile MSCOMM.EXE (size: 28643 bytes) 
                             , and click GO!
      Open the article, and click the button to download the file


  • Internet (anonymous FTP)

          ftp ftp.microsoft.com
      Change to the Softlib/Mslfiles folder
      Get MSCOMM.EXE (size: 28643 bytes) 

    

  • The Microsoft Network

          On the Edit menu, click Go To, and then click Other Location
      Type "mssupport" (without the quotation marks)
      Double-click the MS Software Library icon
      Find the appropriate product area
      Locate and Download MSCOMM.EXE

    

  • Microsoft Download Service (MSDL)

          Dial (206) 936-6735 to connect to MSDL
      Download MSCOMM.EXE (size: 28643 bytes) 

    

For additional information about downloading, please see the following
article in the Microsoft Knowledge Base:



   ARTICLE-ID: Q119591
   TITLE     : How to Obtain Microsoft Support Files from Online Services


This new control fixes a problem where the OnComm event will not fire when
communicating with some 14.4K baud modems.



MORE INFORMATION

 


The date, time, size, and version number of the MSCOMM.VBX file that
shipped with Visual Basic version 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 14.4K baud modem, the OnComm event may not fire. The
revised version of the MSCOMM.VBX control available fixes this problem by
introducing a new Notification property. The problem relates to using
Windows version 3.1 event driven communications. The new property fixes the
problem by allowing you to use Windows version 3.0 polling techniques
instead.


The Notification property is not available at design time, but you can get
and set its property value at run time. It's default value of zero (0)
tells the control to use Windows version 3.0 polling techniques. A value of
1 tells the control to use Windows version 3.1 event driven communications.


Microsoft recommends that you set the property value to 1 if you are
using the MSCOMM control to communicate with a modem that has a baud rate
lower than 14.4K baud.


One other change was made. The default property setting for the Interval
property was changed from 1000 to 55.



Installation

 


To install the new control, copy the updated version to the WINDOWS\SYSTEM
directory on your computer. Also check to make sure that no other copies of
MSCOMM.VBX exist on your computer. If you find an older version of the
MSCOMM.VBX file, delete it or rename it.


NOTE: When installing the updated MSCOMM.VBX, make sure no existing Visual
Basic applications that used the original MSCOMM.VBX are broken. The
updated MSCOMM.VBX (Version: 2.1.0.1) is not compatible with Visual Basic
application .EXE files compiled with the original version of the MSCOMM.VBX
(Version: 2.0.9000.7). These applications must be recompiled with the
2.1.0.1 version of the MSCOMM.VBX in order to work correctly with this
updated .VBX file. The updated version of MSCOMM.VBX fixes a problem where
the OnComm event will not fire when communicating with some 14.4 baud
modems. If the specific problem fixed by the updated MSCOMM.VBX is not a
concern and there are existing Visual Basic applications for which the
source code is not available, use the original MSCOMM.VBX -- not the
updated one.



	
	

	















	






Additional reference words: 2.00 3.00 update3.00 softlib S14642

KBCategory: kbprg kbfile

KBSubcategory: PrgCtrlsCus

Keywords          : PrgCtrlsCus kbfile kbprg

Version           : 2.00 3.00

Platform          : WINDOWS








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	Last reviewed:  March 9, 1998
	

	© 1998 Microsoft Corporation. All rights reserved. Terms of Use.