InStrRev Function

Returns the position of an occurrence of one string within another, from the end of string in an Access desktop database.

Syntax

InStrRev(stringcheck, stringmatch [, start[, compare]])

The InStrRev function syntax has these named arguments:

Argument	Description
stringcheck	Required. String expression being searched.
stringmatch	Required. String expression being searched for.
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.
compare	Optional. Numeric value indicating the kind of comparison to use when evaluating substrings. If omitted, a binary comparison is performed. See Settings section for values.

Settings

The compare argument settings are:

Constant	Value	Description
vbUseCompareOption	-1	Performs a comparison using the setting of the Option Compare statement.
vbBinaryCompare	0	Performs a binary comparison.
vbTextCompare	1	Performs a textual comparison.
vbDatabaseCompare	2	Microsoft Office Access 2007 only. Performs a comparison based on information in your database.

Return Values

If	InStrRev returns
stringcheck is zero-length	0
stringcheck is Null	Null
stringmatch is zero-length	start
stringmatch is Null	Null
stringmatch is not found	0
stringmatch is found within stringcheck	Position at which match is found
start > Len(stringmatch)	0

Remarks

Note that the syntax for the InStrRev function is not the same as the syntax for the InStr function.