INSTR([start] ,string1 ,string2 [,compare])

Returns the position of a substring within a larger string (Long).

start	(Optional) The character position to start searching from (Integer).
string1	The text string containing the text you want to find (String).
string2	The substring to look for (String).
compare	(Optional) A vbCompareMethod constant specifying the type of string comparison to use (Integer): -1 = vbUseCompareOption (uses the "Option Compare" setting) 0 = vbBinaryCompare (default, case sensitive) 1 = vbTextCompare (not case sensitive) 2 = vbDatabaseCompare (uses an Access database)

REMARKS

* This function is case sensitive (by default).
* If "start" is left blank, then 1 is used. (i.e. you start searching from the first character).
* If "start" is 0, then a run-time error occurs.
* If "start" is Null, then an error occurs.
* If "string1" cannot be found in "string2" then 0 is returned.
* If "string1" = "string2" or "string1" is the beginning of "string2" then 1 is returned.
* If "compare" is left blank, then -1 is used. If there is no Option Compare statement provided then vbBinaryCompare (0) is used.
* If "compare" is Null, then an error occurs.
* You can use the INSTRREV function to start at the end.
* You can use the INSTR$ function to return a String data type instead of Variant data type.
* If you type in INSTR$ with valid arguments the editor will automatically change this function to just INSTR.
* You can use the INSTRB function that is used with byte data.
* You can use the MID Function function to return the text string which is a substring of a larger string.
* For more information, refer to the Finding Strings page.
* The equivalent .NET function is Microsoft.VisualBasic.Strings.InStr
* For the Microsoft documentation refer to docs.microsoft.com

Debug.Print InStr("C:\Temp\","C:\")               '= 1  
Debug.Print InStr(1,"C:\Temp\","C:\")             '= 1  
Debug.Print InStr(1,"C:\Temp\","E:\")             '= 0  
Debug.Print InStr(1,"somemoretext","more")        '= 5  
Debug.Print InStr("somemoretext","more")          '= 5  
Debug.Print InStr("somemoretext","somemoretext")  '= 1  
Debug.Print InStr("somemoretext","nothing")       '= 0  
Debug.Print InStr("bettersolutions","better")     '= 1  
Debug.Print InStr("bettersolutions","solutions")  '= 7  

Dim lPosition As Long 
lPosition = InStr("Monday","day") 
Debug.Print lPosition