DOCUMENT:Q186912  20-MAY-1999  [foxpro]
TITLE   :FIX: Error Using Trimcrlf Method of _stringlib Class
PRODUCT :Microsoft FoxPro
PROD/VER:WINDOWS:6.0
OPER/SYS:
KEYWORDS:kbservicepack kbvfp600 kbvfp600bug kbVS600sp2 kbVS600SP1 kbVS600sp3fix

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Visual FoxPro for Windows, version 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

When using the Trimcrlf method of the _stringlib class, one of the following
error messages appear:

   Variable 'CR' is not found

   _STRINGLIB1
   ERROR: 12
   Method: trimcrlf
   Line: 6
   DO WHILE (LEFT(lcString,1)==CR OR LEFT(lcString,1)==LF

-or-

   Variable 'LF' is not found

   _STRINGLIB1
   ERROR: 12
   Method: trimcrlf
   Line: 6
   DO WHILE (LEFT(lcString,1)==CR OR LEFT(lcString,1)==LF

CAUSE
=====

This behavior occurs because the variables CR and LF have not been defined in
the Trimcrlf method of the _stringlib class.

RESOLUTION
==========

The _stringlib class is contained in the _utility class library (_utility.vcx)
located in the \ffc subdirectory of the Visual FoxPro installation directory.
Open the _utility class library and select the _stringlib class. Select the
Trimcrlf method and change the code to read as follows:

      LPARAMETERS tcstring,tltrimleft,tltrimright
      #DEFINE CR CHR(13)
      #DEFINE LF CHR(10)
      LOCAL lcstring
      lcstring=tcstring
      IF tltrimleft

         DO WHILE LEFT(lcstring,1)==CR OR LEFT(lcstring,1)==LF
            lcstring=LTRIM(SUBSTR(lcstring,2))
         ENDDO

      ENDIF
      IF tltrimright

         DO WHILE RIGHT(lcstring,1)==CR OR RIGHT(lcstring,1)==LF
            lcstring=TRIM(LEFT(lcstring,LEN(lcstring)-1))
         ENDDO

      ENDIF
      RETURN lcstring

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information
about Visual Studio service packs, please see the following articles in the
Microsoft Knowledge Base:

   Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

   Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed

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

Steps to Reproduce Behavior
---------------------------

1. Create a program file named Testtrim.prg, using the following code:

      CLOSE ALL
         SET CLASSLIB TO HOME()+"FFC\_UTILITY.VCX"
         outilobject=CREATEOBJECT('array_form')
         outilobject.SHOW
         READ EVENTS

         DEFINE CLASS array_form AS FORM
            TOP = 0
            LEFT = 0
            HEIGHT = 180
            WIDTH = 220
            DOCREATE = .T.
            CAPTION = "_Utilities TRIM CRLF"
            NAME = "ARRAY_FORM"
            AUTOCENTER=.T.

            ADD OBJECT list1 AS LISTBOX WITH ;
               HEIGHT = 125, ;
               LEFT=05, ;
               TOP = 10, ;
               WIDTH = 100, ;
               ROWSOURCETYPE=5, ;
               ROWSOURCE="arraya"

            ADD OBJECT list2 AS LISTBOX WITH ;
               HEIGHT = 125, ;
               LEFT=115, ;
               TOP = 10, ;
               WIDTH = 100, ;
               ROWSOURCETYPE=5, ;
               ROWSOURCE="arrayb"

            ADD OBJECT command2 AS COMMANDBUTTON WITH ;
               LEFT=10, ;
               HEIGHT=25, ;
               CAPTION="\<Close", ;
               TOP=150, ;
               WIDTH=200, ;
               NAME = "Command1"

            ADD OBJECT _arraylib1 AS _arraylib

            ADD OBJECT _stringlib1 as _stringlib

            PROCEDURE LOAD
               PUBLIC arraya, arrayb
               DECLARE arraya[4]
               arraya[1]="Apple "+CHR(13)+CHR(10)
               arraya[2]="Banana "+CHR(13)+CHR(10)
               arraya[3]="Orange "+CHR(13)+CHR(10)

               arraya[4]="Pear "+CHR(13)+CHR(10)
               DECLARE arrayb[4]
               arrayb[1]="Blueberry"
               arrayb[2]="Cherry"
               arrayb[3]="Grapefruit"
               arrayb[4]="Strawberry"
            ENDPROC

            PROCEDURE list1.CLICK
               LOCAL thisval
               thisval=THISFORM.list1.VALUE
               stringval=arraya[thisval]
               FOR i=1 TO ALEN(arraya,1)
                  THISFORM.list1.REMOVEITEM(1)
               ENDFOR
               IF CHR(13)$STRINGVAL
                  stringval=THISFORM._stringlib1.trimcrlf(stringval,.t.,.t.)
               ENDIF
               THISFORM._arraylib1.insaitem(@arrayb,stringval,thisval-1)
               THISFORM._arraylib1.delaitem(@arraya,thisval)
               FOR i=1 TO ALEN(arraya,1)
                  THISFORM.list1.ADDITEM(arraya[i])
               NEXT
               THISFORM.list2.NUMBEROFELEMENTS=ALEN(arrayb,1)
               THISFORM.REFRESH
            ENDPROC

            PROCEDURE list2.CLICK
               LOCAL thisval
               thisval=THISFORM.list2.VALUE
               FOR i=1 TO ALEN(arrayb,1)
                  THISFORM.list2.REMOVEITEM(1)
               ENDFOR
               stringval=arrayb(thisval)
               THISFORM._arraylib1.insaitem(@arraya,stringval)
               THISFORM._arraylib1.delaitem(@arrayb,thisval)
               FOR i=1 TO ALEN(arrayb,1)
                  THISFORM.list2.ADDITEM(arrayb[i])
               NEXT
               THISFORM.list1.NUMBEROFELEMENTS=ALEN(arraya,1)
               THISFORM.REFRESH
            ENDPROC

            PROCEDURE command1.CLICK
               CLEAR EVENTS
            ENDPROC

         ENDDEFINE

2. Click any item in list1. The error message occurs, unless the variables CR
   and LF are defined within the Trimcrlf method of the _stringlib class.

(c) Microsoft Corporation 1999, All Rights Reserved.
Contributions by John Desch, Microsoft Corporation


Additional query words:

======================================================================
Keywords          : kbservicepack kbvfp600 kbvfp600bug kbVS600sp2 kbVS600SP1 kbVS600sp3fix 
Technology        : kbVFPsearch kbAudDeveloper kbVFP600
Version           : WINDOWS:6.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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