How to Stop a Form from Loading

Last reviewed: April 8, 1996
Article ID: Q149433

The information in this article applies to:

Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b

SUMMARY

This article shows how to conditionally stop a form from loading based on the value of an expression by returning false (.F.) from an expression in the Init event of the form.

MORE INFORMATION

You can stop a form from loading if a variable or expression evaluates to false (.F.). For example, if you want to load an inquiry form based on a table called Students only if the table has records, place the following code in the Init event of the form:

   IF RECCOUNT("students")==0
      =messagebox("No students have been entered",64,"Student table empty")
      RETURN .F.
   ENDIF

The Load event occurs, but the form is never instantiated.

Additional reference words: 3.00 3.00b VFoxWin
KBCategory: kbprg kbhowto
KBSubcategory: FxprgClassoop

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.

Last reviewed: April 8, 1996
© 1998 Microsoft Corporation. All rights reserved. Terms of Use.