ACC2000: How to Strip Extra Characters from a String

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Article ID: 210103 - View products that this article applies to.
This article was previously published under Q210103
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Moderate: Requires basic macro, coding, and interoperability skills.

This article applies to a Microsoft Access database (.mdb) and to a Microsoft Access project (.adp).

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This article shows you how to create a custom function to strip extra characters from a string. This function is useful in a situation where the value in a field contains too many spaces between names or has other formatting problems.

Microsoft provides programming examples for illustration only, without warranty either expressed or implied. This includes, but is not limited to, the implied warranties of merchantability or fitness for a particular purpose. This article assumes that you are familiar with the programming language that is being demonstrated and with the tools that are used to create and to debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific requirements.

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To create the custom function to strip extra characters from a string, follow these steps:
  1. Create a module and type the following line in the Declarations section if it is not already there:
    Option Explicit
  2. Type the following procedure:
    Function StripExtraChars(PassedStr, RemoveExtraChar$)
       On Local Error GoTo StripExtraChars_Err
       Dim i As Integer, GotChar As Integer
       Dim HoldStr As String, HoldChar As String
       ' Exit if passed value is Null.
       If IsNull(PassedStr) Then Exit Function
       ' Trim extra characters from passed string.
       PassedStr = Trim$(PassedStr)
       ' Cycle through string and remove extra
       ' string characters specified in the
       ' RemoveExtraChar value.
       For i = 1 To Len(PassedStr)
          HoldChar = Mid$(PassedStr, i, 1)
          If HoldChar = RemoveExtraChar Then
             If GotChar = False Then
                GotChar = True
                HoldStr = HoldStr & HoldChar
             End If
             GotChar = False
          End If
          If Not GotChar Then
             HoldStr = HoldStr & HoldChar
          End If
       Next i
       StripExtraChars = HoldStr
       Exit Function
       MsgBox Error$
       Resume StripExtraChars_End
    End Function
  3. To test this function, type the following line in the Immediate window, and then press ENTER:
    ?StripExtraChars("  My    Test    String   ", Chr$(32))
    Note that the string passed to the StripExtraChars() function returns "My Test String." The RemoveExtraChar$ variable passed into the function uses the Chr$() ASCII code equivalent of a space.


For more information about the Chr() function and character codes, in the Visual Basic Editor, click Microsoft Visual Basic Help on the Help menu, type Chr in the Office Assistant or the Answer Wizard, and then click Search to view the topic.


Article ID: 210103 - Last Review: October 26, 2013 - Revision: 3.0
Applies to
  • Microsoft Access 2000 Standard Edition
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