DOCUMENT:Q70758 01-OCT-1999 [win95x] TITLE :Floating-Point Calculations in Windows Using WIN87EM.DLL PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER:WINDOWS:3.0,3.0a OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows versions 3.0, 3.0a ------------------------------------------------------------------------------- SUMMARY ======= WIN87EM.DLL is a dynamic link library (DLL) that supplies floating-point calculation routines for Windows applications that support math coprocessors. Windows by itself does not use WIN87EM.DLL, but some Windows applications that carry out floating-point calculations require WIN87EM.DLL to be present in the Windows\SYSTEM subdirectory. For example, Microsoft Excel version 3.0 requires WIN87EM.DLL to be present whether or not your computer has a math coprocessor chip. If WIN87EM.DLL is not present, Excel generates the error message: Cannot find Win87em.dll" and will not load If WIN87EM.DLL is damaged, Excel 3.0 attempts to run a second instance of Windows, leaving you in real mode with the error message: Cannot run this application in real mode Other Windows applications may require WIN87EM.DLL and may display similar behavior. MORE INFORMATION ================ Microsoft Windows installs WIN87EM.DLL in the Windows\SYSTEM subdirectory. Windows itself does not generate an error upon loading if it is missing. The error does not occur until an application is loaded and requests the dynamic link library (DLL). If the file is missing or damaged, just expand it from your Windows disks into your Windows\SYSTEM subdirectory. WIN87EM.DLL is on the following Windows 3.0 disks: 5.25-inch 1.2 MB Disk 2 5.25-inch 360K Disk 5 3.5-inch 720K Disk 3 WIN87EM.DLL is on the following Windows 3.1 disks: 5.25-inch 1.2 MB Disk 4 3.5-inch 1.44 MB Disk 4 For information on expanding files, please refer to the README.TXT file in the WINDOWS directory. REFERENCES ========== "Microsoft Windows Guide to Programming," Microsoft Press, section 14.5.7. Additional query words: 3.00 win30 3.00a ====================================================================== Keywords : Technology : kbWin3xSearch kbZNotKeyword3 kbWin300 kbWin300a Version : WINDOWS:3.0,3.0a ============================================================================= 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.