LEN(string | varname)

Returns the number of characters in a string (Long).

string	The text string (String).
varname	The name of the variable (String).

REMARKS

* When VBA stores a string in memory, it always stores the length of the string in a long integer at the start of the string.
* This function retrieves this value and is therefore faster than having to examine the actual characters.
* This function is useful for determining whether a string is a zero-length string ("") and should be used before comparing to a zero length string.
* You must only enter one of the two arguments (either "string" or "varname").
* This function can also be used to determine the number of bytes used to store a variable.
* If "varname" is Null, then Null is returned.
* If "varname" is a Variant then it is treated the same as a string.
* If "varname" is a user defined type, then the size returned is as it will be written to a file is returned.
* You can use the LENB function to use with byte data.
* The equivalent Excel function is LEN
* The equivalent .NET function is Microsoft.VisualBasic.Strings.Len
* For the Microsoft documentation refer to docs.microsoft.com

Debug.Print Len("sometext")        '= 8  
Debug.Print Len("length of text")  '= 14  
Debug.Print Len("true")            '= 4  
Debug.Print Len(true)              ' compile error  
Debug.Print Len(100)               ' compile error  

Dim lResult As Long 
lResult = Len("development") 
Debug.Print lResult