Application.Workbooks Property (Excel)
Returns a Workbooks collection that represents all the open workbooks. Read-only.
Using this property without an object qualifier is equivalent to using Application.Workbooks .
The collection returned by the Workbooks property doesn’t include open add-ins, which are a special kind of hidden workbook. You can, however, return a single open add-in if you know the file name. For example, Workbooks("Oscar.xla") will return the open add-in named "Oscar.xla" as a Workbook object.
This example activates the workbook Book1.xls.
This example opens the workbook Large.xls.
This example saves changes to and closes all workbooks except the one that’s running the example.