LOF Function

This page is specific to the Visual Basic for Applications (VBA) Language Reference for Office 2010.

Returns a Long representing the size, in bytes, of a file opened using the Open statement.



The required filenumber argument is an Integer containing a valid file number.


Use the FileLen function to obtain the length of a file that is not open.


This example uses the LOF function to determine the size of an open file. This example assumes that TESTFILE is a text file containing sample data.

Dim FileLength
Open "TESTFILE" For Input As #1    ' Open file.
FileLength = LOF(1)    ' Get length of file.
Close #1    ' Close file.