DOCUMENT:Q140638 10-FEB-2000 [foxpro] TITLE :PRB: FLL Created Without LCK API Functions Is Invalid PRODUCT :Microsoft FoxPro PROD/VER:WINDOWS:3.0 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual FoxPro for Windows, version 3.0 ------------------------------------------------------------------------------- SYMPTOMS ======== You may receive the error message "Library file is invalid" when using the SET LIBRARY TO command to load an .fll file created with the Library Construction Kit (LCK). CAUSE ===== There appears to be a problem with .fll files that are created for Visual FoxPro that don't call any of the _Functions that are part of the FoxPro API. This is not the case with .fll files created in previous versions. The error appears to be caused by the fact that the DLL doesn't have any exports. Normally a valid .fll file will contain the DispatchAPI export. WORKAROUND ========== Call an extraneous .fll function in the code. STATUS ====== Microsoft is researching this behavior and will post new information here in the Microsoft Knowledge Base as it becomes available. MORE INFORMATION ================ Steps to Reproduce Problem -------------------------- Create an .fll file but don't add any of the Library construction Kit functions besides the FoxTable and FoxInfo structures: // include the library construction header file #include void bugtest(ParamBlk *parm) // the function definition { double c,e; c=3.00; e=++c*3.1415927; //_RetFloat(e,15,10); //Remove comment on previous line to fix error } // the FoxInfo structure registers the function FoxInfo myFoxInfo[] = { {"BUGTEST",(FPFI) bugtest, 0, ""}, }; // the FoxTable structure FoxTable _FoxTable = { (FoxTable *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo }; Additional query words: VFoxWin ====================================================================== Keywords : Technology : kbVFPsearch kbAudDeveloper kbVFP300 Version : WINDOWS:3.0 ============================================================================= 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 2000.