compare text files

Has anyone written something that can compare two text files and output the differences, or know of freewhere I can download to do this?

Here is some code to work with:

VB Code:

Function SameFile(ByVal Path1$, ByVal Path2$) As Boolean
'Nucleus
 Dim ba1() As Byte, ba2() As Byte
 Dim ff&, i&, u&
 
 On Error Resume Next
 If Len(Dir$(Path1)) And Len(Dir$(Path2)) Then
    ff = FreeFile
    Open Path1 For Binary As #ff
    ReDim ba1(0 To LOF(ff) - 1)
    Get #ff, , ba1
    Close #ff
 
    ff = FreeFile
    Open Path2 For Binary As #ff
    ReDim ba2(0 To LOF(ff) - 1)
    Get #ff, , ba2
    Close #ff
 
    u = UBound(ba1)
    If u = UBound(ba2) Then
        For i = 0 To UBound(ba1)
            If ba1(i) <> ba2(i) Then Exit For
        Next
        If i = u + 1 Then SameFile = True
    End If
 End If
End Function

There is actually a DOS command that does this (at least there used to be). Can't remember the name of it though.

DOS file compare command (still works)

fc filname1 filename2

Thanks Nuke, found the dos command it is call ed comp