Has anyone started using any Office 2013 products with
PowerBuilder? What had worked with Office 2010 now raises a
runtime error with Office 2013. Specifically the following
lines of code no longer work:

excel.application.workbooks(1).Parent.Windows(this.ioo_excel.application.workbooks(1).Name).Visible
= True

li_worksheet_count =
excel.Application.ActiveWorkBook.Worksheets.Count

The same VBA code still works in Office 2013 when run
through the macro builder.

Any thoughts?

PowerBuilder 11.5
Excel 2013
Windows 7, 8

Thanks.