Enterprise 4 workbook

CD-1 Enterprise 1 — Beginner: Enterprise 1 — Beginner Coursebook — учебник Enterprise 1 — Beginner Coursebook Audio 3 CD -3 аудио диска. Most of the time, you’ll probably want to save your workbooks in the current file format (.xlsx). But sometimes, you might need to save a workbook in another. Is there a way to see if an Excel Workbook, say DataSheet.xls, is open (in use) or not? I would like to close that Workbook if it is opened.