How to: Activate Workbooks

The Activate method of the Workbooks collection activates a Microsoft Office Excel workbook and selects the first sheet in the workbook.

Applies to: The information in this topic applies to document-level projects and application-level projects for Excel 2007 and Excel 2010. For more information, see Features Available by Office Application and Project Type.

To activate a workbook

  • Use the Activate method of the Workbooks collection.


You can index into the Workbooks collection using either integers (indicating the position within the collection) or workbook names. If you want to refer to a workbook by name, you must use the name as it appears in the title bar, which does not include the file name extension until you save the file.

To reference individual workbooks

  • Use the position number or the name of the workbook.

    Dim wb As Excel.Workbook = Me.Application.Workbooks(1)
    ' Before Book1 is saved:
    wb = Me.Application.Workbooks("Book1")
    ' After Book1 is saved:
    wb = Me.Application.Workbooks("Book1.xls")
    Excel.Workbook wb = this.Application.Workbooks[1];
    // Before Book1 is saved:
    wb = this.Application.Workbooks["Book1"];
    // After Book1 is saved:
    wb = this.Application.Workbooks["Book1.xls"];

To activate the workbook associated with a document-level project

  • In document-level projects only, activate the workbook by using ThisWorkbook.


See Also


How to: Open Workbooks

How to: Save Workbooks

How to: Close Workbooks

How to: Select Worksheets

How to: Protect Workbooks


Working with Workbooks

Host Items and Host Controls Overview

Programmatic Limitations of Host Items and Host Controls

Host Items and Host Controls Overview