Microsoft KB Archive/109729

= ACC: Sample Function to Reverse the Characters in a String =

Article ID: 109729

Article Last Modified on 1/18/2007

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APPLIES TO


 * Microsoft Access 1.0 Standard Edition
 * Microsoft Access 1.1 Standard Edition
 * Microsoft Access 2.0 Standard Edition
 * Microsoft Access 95 Standard Edition
 * Microsoft Access 97 Standard Edition

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This article was previously published under Q109729



Moderate: Requires basic macro, coding, and interoperability skills.



SUMMARY
This article shows you how to create a function called ReverseString that reverses the characters in a string, and describes how to use the ReverseString function to sort records in a query with the results of the function.

This article assumes that you are familiar with Visual Basic for Applications and with creating Microsoft Access applications using the programming tools provided with Microsoft Access. For more information about Visual Basic for Applications, please refer to your version of the "Building Applications with Microsoft Access" manual.

NOTE: Visual Basic for Applications is called Access Basic in Microsoft Access versions 1.x and 2.0. For more information about Access Basic, please refer to the "Introduction to Programming" manual in Microsoft Access version 1.x or the "Building Applications" manual in Microsoft Access version 2.0



MORE INFORMATION
The ReverseString function returns a string with the characters reversed from the original argument string. For example, if the string "ABCD" were passed to the function, the string "DCBA" would be returned.

The following example demonstrates how to create and use the ReverseString function:

 Open the sample Northwind.mdb database (or NWIND.MDB in versions 1.x and 2.0). Create a module and type the following line in the Declarations section, if it isn't already there:

Option Explicit

  Type the following procedure: Function ReverseString (MyString As String) Dim StringReversed As String Dim MyStringLength As Integer, X         MyStringLength = Len(MyString) For x = 1 To MyStringLength StringReversed = Mid(MyString, x, 1) & StringReversed Next x         ReverseString = StringReversed End Function   Create the following new query based on the Categories table:      Query: Query1 ---     Field: CategoryName Show: (selected) Field: Expr1: ReverseString([CategoryName]) Sort: Ascending Show: (not selected) NOTE: In version 1.x and 2.0, type a space in the Category Name field name.   On the Query menu, click Run. Note that the following items are returned:      CategoryName Seafood Produce Beverages Grains/Cereals Confections Dairy Products Condiments Meat/Poultry </li></ol>

The returned records are sorted in ascending order on the CategoryName field, but the field is sorted from right to left, rather than from left to right. For example, Seafood is sorted on "d," Produce on "e," Beverages on "s," and so on.

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