If this is something that is important to you (and your project), I strongly urge you to get the Report Generation Toolkit. Several years ago (before NI greatly improved the toolkit), I needed to read and write data to an Excel Workbook. It was not easy using the toolkit, so I bit the bullet and learned enough ActiveX to accomplish the task (it wasn't easy).
I recently was revisiting this application (the Workbook had been significantly redesigned, with different Worksheets and a much better organization). I discovered that the new Report Generation Toolkit functions were much easier to use, and worked much better, than either the older Toolkit or my custom ActiveX solution. Furthermore, I discovered that ActiveX "support" within both LabVIEW and Microsoft, in general, was largely missing -- while it was still present on the old Windows XP system running LabVIEW 7.0 and Office 2003, I had a lot of difficulty even finding the appropriate Help files for Windows 7, LabVIEW 2012, and Office 2010. Another reason to use the Report Generation Toolkit ...