DOCUMENT:Q147820 09-AUG-2001 [winnt] TITLE :Slow Performance Running VB 3.0 Applications on Windows NT PRODUCT :Microsoft Windows NT PROD/VER:winnt:3.5,3.51; : OPER/SYS: KEYWORDS:kbnetwork ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation versions 3.5, 3.51 - Microsoft Windows NT Server versions 3.5, 3.51 ------------------------------------------------------------------------------- SYMPTOMS ======== Multiple Microsoft Visual Basic (VB) 3.0 applications running in separate memory spaces will slow the operating system significantly when opening a messagebox. RESOLUTION ========== Use a custom form instead of a message box, or upgrade to VB 4.0. -or- For Windows NT 3.51 systems, apply the hotfix described below. -or- For Windows NT 3.5 systems, upgrade to Windows NT 3.51, and then apply the hotfix described below. STATUS ====== Microsoft has confirmed this to be a problem in Windows NT version 3.51. A supported fix is now available, but is not fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Product Support Services for more information. MORE INFORMATION ================ Steps to Reproduce Problem -------------------------- 1. Create an application in VB 3.0 that has a form with a button that runs a message box using the MsgBox function. 2. Run 3 or more instances of the application in a separate memory space. 3. Press the command button on one of the forms and notice the performance degradation. Additional query words: prodnt ====================================================================== Keywords : kbnetwork Technology : kbWinNTsearch kbWinNTWsearch kbWinNT351search kbWinNT350search kbWinNTW350 kbWinNTW350search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS351 kbWinNTS350 kbWinNTS351search kbWinNTS350search Version : winnt:3.5,3.51; : ============================================================================= 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 2001.