Option Explicit
Sub NewestFile()
Dim MyPath As String
Dim MyFile As String
Dim LatestFile As String
Dim LatestDate As Date
Dim LMD As Date
MyPath = "C:\Users\Documents\"
If Right(MyPath, 1) <> "\" Then MyPath = MyPath & "\"
MyFile = Dir(MyPath & "*.xls", vbNormal)
If Len(MyFile) = 0 Then
MsgBox "No files were found...", vbExclamation
Exit Sub
End If
' Initialize LatestDate with an early date
LatestDate = DateSerial(1900, 1, 1)
Do While Len(MyFile) > 0
LMD = FileDateTime(MyPath & MyFile)
If LMD > LatestDate Then
LatestFile = MyFile
LatestDate = LMD
End If
MyFile = Dir
Loop
Workbooks.Open MyPath & LatestFile
End Sub