Visual Basic for Applications Reference
Len(string | varname)
The Len function syntax has these parts:
|string||Any valid string expression. If string contains Null, Null is returned.|
|Varname||Any valid variable name. If varname contains Null, Null is returned. If varname is a Variant, Len treats it the same as a String and always returns the number of characters it contains.|
One (and only one) of the two possible argument must be specified. With user-defined types, Len returns the size as it will be written to the file.
*Note* Use the LenB function with byte data contained in a string, as in double-byte character set (DBCS) languages. Instead of returning the number of characters in a string, LenB returns the number of bytes used to represent that string. With user-defined types, LenB returns the in-memory size, including any padding between elements. For sample code that uses LenB, see the second example in the example topic.
*Note* Len may not be able to determine the actual number of storage bytes required when used with variable-length strings in user-defineddata types.