DOCUMENT:Q97371 04-DEC-1999 [win16sdk] TITLE :SAMPLE: VLB.exe Implements a Virtual List Box PRODUCT :Microsoft Windows Software Development Kit PROD/VER:WINDOWS:3.1 OPER/SYS: KEYWORDS:kbfile kbsample kb16bitonly kbCtrl kbListBox kbGrpDSUser kbOSWin310 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows Software Development Kit (SDK) 3.1 ------------------------------------------------------------------------------- SUMMARY ======= VLB.exe implements a single-selection, single-column virtual list box that is capable of displaying millions of items. The standard list box control in Microsoft Windows can contain a limited number of items. VLB.exe shows how to implement list boxes that exceed this limitation. The standard list box control in Microsoft Windows can contain a limited number of items. Applications may need to implement list boxes that exceed this limitation. This article introduces a custom control called VLIST, which is a virtual list box capable of displaying millions of items. Part 1 of the article provides instructions for using the VLIST virtual list box, and documents the styles and messages that VLIST supports. Part 2 describes how VLIST was implemented, and discusses the problems encountered and decisions made during the implementation; readers who would like to modify VLIST or implement their own virtual list box may find this section interesting. For a working example of VLIST, see the Microsoft Developer Network CD---the topic listing in the Index window was implemented with VLIST. MORE INFORMATION ================ The following file is available for download from the Microsoft Download Center: VLB.exe (http://download.microsoft.com/download/platformsdk/sample87/3.1/W31/EN-US/VLB.exe) For additional information about how to download Microsoft Support files, click the article number below to view the article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services Microsoft used the most current virus detection software available on the date of posting to scan this file for viruses. Once posted, the file is housed on secure servers that prevent any unauthorized changes to the file. Additional query words: ====================================================================== Keywords : kbfile kbsample kb16bitonly kbCtrl kbListBox kbGrpDSUser kbOSWin310 Technology : kbAudDeveloper kbWin3xSearch kbSDKSearch kbWinSDKSearch kbWinSDK310 Version : WINDOWS:3.1 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.