DOCUMENT:Q187716 16-JUN-1998 [vbwin] TITLE :DOC: Incorrect API Text Viewer Declaration of GetVersionEx API PRODUCT :Microsoft Visual Basic for Windows PROD/VER: OPER/SYS:WINDOWS KEYWORDS:kberrmsg kbdocerr ====================================================================== --------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual Basic Standard, Professional, and Enterprise Editions, 32-bit only, for Windows, version 4.0 - Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, version 5.0 --------------------------------------------------------------------- SUMMARY ======= The following error occurs when you use the GetVersionEx API function declaration from the API Text Viewer. Compiler Error: User defined type may not be passed ByVal MORE INFORMATION ================ The Declare statement for GetVersionEx in the API Text Viewer incorrectly passes a user-defined data type using the ByVal keyword. To correct this problem, remove the ByVal modifier. The correct declaration is: Private Declare Function GetVersionEx Lib "kernel32" Alias _ "GetVersionExA" (lpVersionInformation As OSVERSIONINFO) As Long You can also change the statement in the file win32api.txt so the next time you use the API Text Viewer, the Declare statement will be correct. REFERENCES ========== For more information on using GetVersionEx, please see the following article in the Microsoft Knowledge Base: ARTICLE-ID: Q137032 TITLE : HOWTO: Determine Which 32-bit Operating System Is Being Used To learn more about the Windows API and the API Text Viewer, please see: Visual Basic Books Online; search on: "API"; topic: Accessing the Microsoft Windows API (c) Microsoft Corporation 1998, All Rights Reserved. Contributions by Richard T. Edwards, Microsoft Corporation Additional query words: kbAPI, kbVBp400bug, kbVBp500bug, kbDSupport, kbDSD ====================================================================== Keywords : kberrmsg kbdocerr Platform : WINDOWS ============================================================================= 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 1998.