I did adapt my class to support this:

        ' Based on the type
        Select Case loFileType.nNoFileType

            ' XLS
            Case 3

                ' Initialization
                lcConnection = "provider=Microsoft.Jet.OLEDB.4.0; data source='" + cSource + "'; Extended Properties=Excel 8.0;"

                ' XLSX
            Case 18

                ' Initialization
                lcConnection = "provider=Microsoft.ACE.OLEDB.12.0; data source='" + cSource + "'; Extended Properties=Excel 8.0;"

        End Select

However, at first, it says this:

"Microsoft.ACE.OLEDB.12.0' provider is not registered on the..."

So, this was required to make it work:

"2007 Office System Driver: Data Connectivity Components"

Once prompted to download, I ended with this file: AccessDatabaseEngine.exe

This works. But, I have some doubt as to know what was installed exactly.

So, when looking at the program files, I see: "Microsoft Office Access database engine 2007 (English)"

Talk about going around something you do not want. Is there really such a driver or we have to install this Access software?