DOC: Code on Pages 75-76 of Developer's Guide Causes Error

 Last reviewed: January 8, 1997
Article ID: Q139110
The information in this article applies to:
  • Microsoft Visual FoxPro for Windows, version 3.0

SUMMARY

When you use the code example listed on pages 75-76 of the Developer's Guide, the following error occurs: 

   Error with <ObjectName>- Height: Expression evaluated
   to an illegal value
This documentation error has been fixed in Visual FoxPro 5.0 for Windows.

MORE INFORMATION

The error occurs because 12 is not a valid size for the Height property of the object when the ScaleMode property is set to 3 (Pixels). The default ScaleMode property of the form is set to Pixels, and the object is designed to use Foxels, even though there is a line in the DEFINE CLASS grdProducts AS Grid stating: 

   ScaleMode = 0
The ScaleMode property is a property of the form, not the grid.

To use the code example, make these two changes:

  1. Move the ScaleMode property into the code for the DEFINE CLASS GridForm AS FORM.

  2. Place "Height = 12" in the PROCEDURE INIT of the grid.

By the time the grid is to be shown, the form's ScaleMode property will now be set to 0 (Foxels).

After you make the two changes, the code from the Developer's Guide should look like this: 

   DEFINE CLASS GridForm AS FORM
       ScaleMode = 0
       <other statements>
   ENDDEFINE

   DEFINE CLASS grdProducts AS Grid
    <other statements>

     PROCEDURE INIT
       This.Height = 12
     ENDPROC

   ENDDEFINE

KBCategory: kbprg kbdocerr kbdocfix
KBSubcategory: FxotherDochelp
Additional reference words: docerr 3.00 VFoxWin 5.00

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Last reviewed: January 8, 1997
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