DOCUMENT:Q185859 11-DEC-1999 [foxpro] TITLE :INFO: OLE Servers Return Date Calculation Results as Seconds PRODUCT :Microsoft FoxPro PROD/VER:WINDOWS:5.0,5.0a OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual FoxPro for Windows, versions 5.0, 5.0a ------------------------------------------------------------------------------- SUMMARY ======= By default, a date data type passed in to or out of a Visual FoxPro OLE server is automatically converted to Datetime format. Because of this, the result of a date calculation is returned as seconds. MORE INFORMATION ================ The Visual FoxPro OLE servers, by default, convert the Date data type to DateTime. If you try to subtract two datetime() variables, within an OLE server, the result is returned as seconds (n * 86400). You may use the TTOD() function if you need the number returned as days. Steps to Reproduce Behavior --------------------------- 1. Using Visual FoxPro, build an OLE DLL using the following code and name it DateFunc: DEFINE CLASS DateFunc AS custom OLEPUBLIC Name = "DateFunc" PROCEDURE DifferDate PARAMETERS BDate, EDate x=EDate-BDate RETURN INT(x) ENDPROC ENDDEFINE 2. After building the OLE DLL, issue the following commands in the Command window: ox=CREATEOBJECT("DateFunc.DateFunc") ? ox.Differdate({01/01/98},{01/05/98}) Note that instead of returning four days, 345600 (4*86400) seconds is returned. 3. To return four days from the OLE DLL, replace the commands in the DifferDate procedure as shown below: PROCEDURE DifferDate PARAMETERS BDate, EDate x=ttod(EDate)-ttod(BDate) RETURN INT(x) ENDPROC REFERENCES ========== For additional information, please see the following articles in the Microsoft Knowledge Base: Q168053 HOWTO: Visual FoxPro Automation Servers and Active Server Pages Q156014 How To Set Up OLE Automation in Visual FoxPro 5.0 Additional query words: kbDSupport kbdse VFP600REL kbole ====================================================================== Keywords : Technology : kbVFPsearch kbAudDeveloper kbVFP500 kbVFP500a Version : WINDOWS:5.0,5.0a Issue type : kbinfo ============================================================================= 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.