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Q146437: Horizontal Scrolling List Box in an MFC Class

Article: Q146437
Product(s): Microsoft C Compiler
Version(s): 4.0,4.1,4.2,5.0,6.0
Operating System(s): 
Keyword(s): kbfile kbSample kbCtrl kbListBox kbMFC kbScrollBar KbUIDesign kbVC400 kbVC500 kbVC600 k
Last Modified: 14-AUG-2002

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The information in this article applies to:

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++, 32-bit Editions, versions 4.0, 4.1 
   - Microsoft Visual C++, 32-bit Enterprise Edition, versions 4.2, 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Professional Edition, versions 4.2, 5.0, 6.0 
   - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
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SUMMARY
=======

The HLISTBOX sample contained in HLISTBOX.EXE illustrates how to implement
horizontal scrolling in a CListBox-derived class.

The following files are available for download from the Microsoft Download
Center:

Visual C++ 6.0:

  Hlistbox.exe

For additional information about how to download Microsoft Support files, click
the following article number to view the article in the Microsoft Knowledge
Base:

  Q119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current
virus-detection software that was available on the date that the file was
posted. The file is stored on secure servers that prevent any unauthorized
changes to the file.

Visual C++ .NET:

  DownloadDownload Hlistboxvcnet.exe now
  (http://download.microsoft.com/download/visualstudionet/other/1.32/win98mexp/en-us/Hlistboxvcnet.exe)

Release Date: August 14, 2002

For additional information about how to download Microsoft Support files, click
the following article number to view the article in the Microsoft Knowledge
Base:

  Q119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current
virus-detection software that was available on the date that the file was
posted. The file is stored on secure servers that prevent any unauthorized
changes to the file.


NOTE: Use the -d option when running HLISTBOX.EXE to decompress the file and
recreate the proper directory structure.

MORE INFORMATION
================

HLISTBOX implements a new class called CHorzListBox that is derived from
CListBox. This new class automatically updates the horizontal extent of a list
box to that of the longest string included in the list box. It works well with
list boxes that have or don't have the LBS_USETABSTOPS style. An ordinary
Windows list box does not attempt to implement horizontal scrolling of this
nature.

Basically, the CHorzListBox intercepts all messages that would affect the
horizontal extent based on the string lengths. It tracks the extent of all
strings in the list box through an array. Examine the source code for details.

Sample Files    Descriptions
------------------------------------------------------------------------

HLB.CPP         Implementation of the CHorzListBox class.

HLISTBOX.CPP    Application, mostly AppWizard generated dialog-based
               application.

HLISTDLG.CPP    Implementation of the test dialog. Also the
               application's main window.

NOTE: The "Lock/Unlock" button on the main dialog locks and unlocks the automatic
updating of horizontal extent for the list box.

Additional query words: 4.00 scroll bar scrollbar listbox

======================================================================
Keywords          : kbfile kbSample kbCtrl kbListBox kbMFC kbScrollBar KbUIDesign kbVC400 kbVC500 kbVC600 kbGrpDSMFCATL 
Technology        : kbAudDeveloper kbMFC
Version           : :4.0,4.1,4.2,5.0,6.0

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