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MS Access

InStr

Using the InStr Function

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

The InStr function returns the position of the first occurrence of a string in another string.

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

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

searchin is the string that will be searched.

searchfor is the string to search for.

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

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

InStr - Function Engine

The result is 2.

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
IfInStr 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

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

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

	Private Sub Form_Load()
		txtInStr = InStr("Hello, My name is", "e")
	End Sub
	

Course(s)

Access 2013 Access Expert 14 | Access 2013 Access Expert 19

Access 2003 Access 222 | Access 2003 Access 308

Seminars

Access 2007 Access Email | Access 2007 Access Search | Access 2007 Access SQL 2 | Access 2007 Access Web Sync

Tips

See this FREE Tip on InStr.

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Alex Hedley (Avatar) By: Alex Hedley


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