LOF Function

LOF Function

---

Class

Microsoft.VisualBasic.FileSystem

Syntax

     Dim result As Long = LOF(fileNumber) 

fileNumber (required; Integer)

Any valid file number of a file opened with FileOpen

Description

The LOF function returns the size of an open file in bytes.

Usage at a Glance

LOF works only on an open file; if you need to know the size of a file that isn't open, use the FileLen function.

Example

The following example shows how to use the LOF function to prevent reading past the end of a file in binary mode:

     Dim oneChar As Char     Dim fileID As Integer = FreeFile(  )     FileOpen(fileID, "c:\data.txt", OpenMode.Binary, OpenAccess.Read)     Do While (Loc(fileID) < LOF(fileID))        FileGet(fileID, oneChar)        Console.WriteLine(Loc(fileID) & ": " & oneChar)     Loop     FileClose(fileID) 

Version Differences

In Visual Basic 2005, the My.Computer.FileSystem object provides more robust access to file-management features.

See Also

FileLen Function, FileOpen Procedure