[VB.NET] IsAutoITFile [Function]

Private Function IsAutoITFile(ByVal sPath) As Boolean
    Dim sFile As String = My.Computer.FileSystem.ReadAllText(sPath)

    If sFile.Contains("AU3!EA") = True Then
        Return True
    Else
        Return False
    End If
End Function

If IsAutoITFile("C:\file.exe") = True Then
    MsgBox("It's a AutoIT file !")
ElseIf IsAutoITFile("C:\file.exe") = False Then
    MsgBox("It'isnt a AutoIT file !")
EndIf