How to: Programmatically Create New Workbooks
When you create a workbook programmatically, it is a native Microsoft.Office.Interop.Excel.Workbook object, not a Microsoft.Office.Tools.Excel.Workbook host item.
Applies to: The information in this topic applies to document-level projects and VSTO add-in projects for Excel. For more information, see Features Available by Office Application and Project Type.
You can generate a Microsoft.Office.Tools.Excel.Workbook host item for a Microsoft.Office.Interop.Excel.Workbook object in VSTO Add-in project. For more information, see Extending Word Documents and Excel Workbooks in VSTO Add-ins at Run Time.
To create a new workbook
Use the Add method of the Workbooks collection.
Note
You can create a workbook based on a template other than the default template: pass the template you want to use as a parameter to the Add method.
Extending Word Documents and Excel Workbooks in VSTO Add-ins at Run Time
Adding Controls to Office Documents at Run Time
Working with Workbooks
How to: Programmatically Open Workbooks
How to: Programmatically Save Workbooks
How to: Programmatically Close Workbooks
Programmatic Limitations of Host Items and Host Controls
Optional Parameters in Office Solutions
Host Items and Host Controls Overview