Export XLS files

Hi all.

Does anyone know a function to export "real" XLS files from SAP ECC 6?

When we try to export in this format, besides the XLS extension, the file content is a CSV (separated by tabs) which I have to open in Excel to convert into a real XLS file.

I would like to generate a "real" XLS from SAP to be imported into another into another application (which doesn't accept CSV format) without having the extra step of the conversion in Excel.

Thanks in advance.