AreTheyTheSame

Function AreTheyTheSame(ByVal File1, ByVal File2, Optional StringentCheck As Boolean = False) As Boolean
'**********************************************************
' PURPOSE: Check to see if two files are identical
' File1 and File2 = FullPaths of files to compare
' StringentCheck (optional): If false (default), will only compare file lengths. If true, a byte by byte comparison is conducted if file lengths are equal
'**********************************************************
On Error GoTo ErrorHandler
If Dir(File1) = "" Then Exit Function
If Dir(File2) = "" Then Exit Function
Dim lLen1 As Long, lLen2 As Long
Dim iFileNum1 As Integer
Dim iFileNum2 As Integer
Dim bytArr1() As Byte, bytArr2() As Byte
Dim lCtr As Long, lStart As Long
Dim bAns As Boolean
lLen1 = FileLen(File1)
lLen2 = FileLen(File2)
If lLen1 < > lLen2 Then
AreTheyTheSame =false
Exit Function
ElseIf StringentCheck = False Then
AreTheyTheSame = True
Exit Function
Else
iFileNum1 = FreeFile
Open File1 For Binary Access Read As #iFileNum1
iFileNum2 = FreeFile
Open File2 For Binary Access Read As #iFileNum2
' put contents of both into byte Array
bytArr1() = InputB(LOF(iFileNum1), #iFileNum1)
bytArr2() = InputB(LOF(iFileNum2), #iFileNum2)
lLen1 = UBound(bytArr1)
lStart = LBound(bytArr1)
bAns = True
For lCtr = lStart To lLen1
If bytArr1(lCtr) < > bytArr2(lCtr) Then
bAns = False
Exit For
End If
Next
AreTheyTheSame = bAns
End If
ErrorHandler:
If iFileNum1 > 0 Then Close #iFileNum1
If iFileNum2 > 0 Then Close #iFileNum2
End Function