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Q132727: How to Use a UDF to Calculate Percentages in a Report

Article: Q132727
Product(s): Microsoft FoxPro
Version(s): WINDOWS:2.6a,3.0
Operating System(s): 
Keyword(s): 
Last Modified: 15-FEB-2000

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 3.0 
- Microsoft FoxPro for Windows, version 2.6a 
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SUMMARY
=======

To calculate percentages of a group total in report using the Report Writer, you
must create a UDF (user defined function).

MORE INFORMATION
================

The FoxPro Report Writer calculates totals in a top down manner. To get a detail
item's percentage of a total that resides in the group footer band, the total
must first be calculated in the group header. This can be accomplished by using
the following code in a UDF:

        SET TALK OFF
     PUBLIC msum     && initialize variable for sum total
     msum=0
     y=RECNO()       && store record number to variable so total from
     * previous group is not added on
     x=<field name>  && store field which is grouped to variable
     SUM <numeric field name> FOR  x=<field name> TO msum
     GO y
     RETURN msum     && this will simply display the total in the group
     * header that appears in the group footer

For more information about UDFs, please see the following article in the
Microsoft Knowledge Base:

  Q113754 "Syntax Error" When Verifying UDF() in Report Writer

Additional query words: VFoxWin

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Keywords          :  
Technology        : kbVFPsearch kbAudDeveloper kbFoxproSearch kbFoxPro260a kbVFP300
Version           : WINDOWS:2.6a,3.0

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