PRB: Class Names in VFP 5.0 are Case Sensitive (161359)


The information in this article applies to:

  • Microsoft Visual FoxPro for Windows 3.0b
  • Microsoft Visual FoxPro for Windows 5.0
  • Microsoft Visual FoxPro for Windows 6.0
  • Microsoft Visual FoxPro for Macintosh, Professional Edition 3.0
This article was previously published under Q161359

SYMPTOMS

When referencing an object class or base class for comparison, the class name is case sensitive.

When testing the class property of a command button and comparing the property setting to the string "commandbutton" rather than "Commandbutton," the code fails. The 'c' in Commandbutton must be capitalized.

RESOLUTION

The text used for comparison must match the property setting exactly.

STATUS

This behavior is by design.

MORE INFORMATION

Steps to Reproduce Behavior

  1. Create a form with a command button. The base class is Commandbutton and the class is Commandbutton.
  2. Place the following code in the Click event of a command button: 
          i=1
      FOR i = 1 to ThisForm.ControlCount
         IF ThisForm.Controls(i).Class = "commandbutton" THEN
            WAIT WINDOW ThisForm.Controls(i).Name
         ELSE
            WAIT WINDOW "This is not a Command Button:  "  + ;
                         ThisForm.Controls(i).Name
         ENDIF
      NEXT i
The code above returns a Wait window indicating the commandbutton class is not a command button because the 'c' in commandbutton is lowercase. Replace the lowercase "c" with an uppercase "C," and it works properly.

Replace: 
   IF ThisForm.Controls(i).Class = "commandbutton" THEN
With: 
   IF ThisForm.Controls(i).Class = "Commandbutton" THEN
Modification Type:MajorLast Reviewed:12/3/2003
Keywords:KB161359
©2003 Microsoft Corporation. All rights reserved.