InStr vs InStrRev functions in VBA example inbuilt functions

InStr vs InStrRev

Both functions works to find the first occurrence of a word given under search criteria in a string. If value found a valid index would be return which will represent > 0 if no match then it returns 0. The difference between InStr and InStrRev is search direction.

InStr Syntax

InStr(Start, String1, String2, CompareMethod)

Start: represents a valid positive integer from where you would like to start search in given string
String1: refers to the string on which search needs to be performed
String2: refers to word that you would like to search within String1
CompareMethod: there are three types of compare methods:
- vbTextCompare : performs text to text compare, integer constant value is 1
- vbDatabaseCompare: performs database value comparison, integer constant value is 2
- vbBinaryCompare: performs binary comparison, integer constant value is 0

InStrRev Syntax

InStrRev(StringCheck, StringMatch, Start,CompareMethod)

StringCheck: refers to the string on which search needs to be performed
StringMatch: refers to word that you would like to search within StringCheck
Start: Optional. Numeric expression that sets the starting position for each search. If omitted, -1 is used, which means that the search begins at the last character position. If start contains Null, an error occurs.
CompareMethod: there are three types of compare methods:
- vbTextCompare : performs text to text compare, integer constant value is 1
- vbDatabaseCompare: performs database value comparison, integer constant value is 2
- vbBinaryCompare: performs binary comparison, integer constant value is 0
- vbUseCompareOption: performs a comparison by using the setting of the Option Compare statement.

Code example

Sub CheckInstr()
    'Declare constant having "testing" words twice
    Const VBAOVERALL_STRING As String = "this is my testing string where testing will happen based on instr function"
    
    'A variable to grab the index
    Dim oResult As Integer
    
    'InStr example
    oResult = InStr(1, VBAOVERALL_STRING, "TTT", vbTextCompare)
    Debug.Print "InStr found testing at " & oResult & " index"
    
    'InStrRev
    oResult = InStrRev(VBAOVERALL_STRING, "testing", -1, vbBinaryCompare)
    Debug.Print "InStrRev found testing at " & oResult & " index"
End Sub

Output

Please leave your comments or queries under comment section also please do subscribe to out blogs to keep your self upto date.

Share on Facebook

VBA Basic and Advanced Questions and Answers

Basic Q&A Q. VBA stands for? Ans: Visual Basic for Applications Q. What is VBA? Ans: VBA (Visual Basic for Applications) is a scripting language. It can be used to automate most of the Microsoft Office Applications like Excel, Word, PowerPoint, MS Access, Outlook etc. Q. Types of available modules in VBA VBA contains four […]

Export Generic Collection to PDF ASP.Net Core MVC

PDF Sometime you may in need to export data in PDF. Following code will use Syncfusion Package and give you ready made Table pushed from Generic collection. Put below code in Repository Put below code in Controller JavaScript Code Finally you can attach id to an element in html and in JavaScript on Document ready […]

Export Excel ASP.Net Core MVC

Excel Export Following Example helps you to export excel from database in a generic way using EPPlus library. Requirement EPPlus Nuget Package Code to Repository Supporting Method Code to Controller Code to JavaScript JavaScript Supporting Method You can hit ExportToExcel() call in document ready method in JavaScript document by pointing any id written in HTML […]

Save/Retrieve Session ASP.Net Core MVC

Session Plays a vital role while dealing with caching in your browser. ASP.Net Core offers Session caching fast and reliable way. Here is the practical example. Put following code anywhere in common class or Repository, it has two methods Generic in nature Add/Get. Add Method will allow you to cache object in Browser memory and […]

Number List in Word Document using C# code example

Number List Microsoft Word offers feature by which you can auto number your list in various formats. In this article we will write code to dynamically generate a numbered list in a document using C#. C# Code example Note: You have to add Microsoft Word Interop library as reference to enable Using statement or create […]

Sorting in Microsoft Word using VBA (Visual Basic for Applications)

Sorting Do you know, Microsoft Word has capability to perform sorting over a document. In this article we will write code to sort paragraphs in Alphabetical order using visual basic for applications code. Before code Code example Put above code in a module, Select number of paragraphs that you would like to sort in A-Z […]

EPPlus Open Office Xml Office solution using C#

EPPlus Is an open Office XML solution, highly useful library capable to manipulate Microsoft Excel similar to Introp APIs. Why EPPlus? As per Microsoft the solutions (Excel, Word, PowerPoint, Outlook etc) built for client architecture but what about Servers? Let’s take an example that I have recently faced and EPPlus helped me a lot here. […]

String vs StringBuilder C#.Net with code example

String C# class which offers capability to store any type of string data into a variable. Strings are immutable (non-modifiable) cause performance overhead because each time we modify a string it creates a copy of modified instance into the memory, hence, as a practice string should be avoided for large string operations. Following is the […]

Var vs. Dynamic C# with code example

Var vs. Dynamic C# offers variety with flavors to accomplish the task to the developers. var keyword defines a static nature which gets resolve at compile-time introduced in C# 3.0 where dynamic gets resolved at runtime introduced in C# 4.0. Var is a statically type variable, which means values of these variables gets decoded at […]

Multi-threading in C#.Net with step by step code example

Multi-threading Is a concept to execute multiple tasks or process simultaneously. Basically multi-threading enables paths to your application to execute multiple processes. Multi-threading can be achieved in C# using System.Threading name space which provides complete control over threading. Let’s write example code where we will execute two different methods to print numbers using loop and […]

InStr vs InStrRev functions in VBA example