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MS Access

InStrRev

Using the InStrRev Function

In this tutorial you will learn how to use the InStr Function.

The InStrRev returns the position of an occurrence of one string within another, from the end of string.

=InstrRev ( searchin, searchfor [, start] [, compare] )

searchin is the string that will be searched.

searchfor is the string to search for.

start is optional. It is the starting position for the search. If this parameter is omitted, the search will begin at position 1.

compare is optional. This is the type of comparison to perform.

In this example we will use a given sentance: "Hello, My name is"

InStrRev - Function Engine

The result is 14.

The Settings are:

Compare
ConstantValueDescription
vbUseCompareOption-1Performs a comparison using the setting of the Option Compare statement.
vbBinaryCompare0Performs a binary comparison.
vbTextCompare1Performs a textual comparison.
vbDatabaseCompare2Performs a comparison based on information in your database. (Microsoft Office Access 2007 only.)

The Return Values:

Return Values
IfInStrRev Returns
searchin is zero-length0
searchin is NullNull
searchfor is zero-lengthstart
searchfor is NullNull
searchfor is not found0
searchfor is found within searchinPosition at which match is found
start > Len(searchfor)0

FORM

In a Form you could set the Default Value of a Textbox to

	=InStrRev("Hello, My name is", "e")
	
VBA

In a Form add a TEXTBOX control and rename it "txtInStrRev", then you could add the following in the Load Event.

	Private Sub Form_Load()
		txtInStrRev = InStrRev("Hello, My name is", "e")
	End Sub
	

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