Thomas Baier
R: Windows Component Services -- Integrating and Excel on the COM Layer
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On the Windows platform a standardized model for component services
and interprocess and inter-machine communication has been
established by Microsoft---COM. As many applications provide their
own or use third party COM services, extending R by means of COM
interfaces is a natural way for integration of R into the user's
desktop.

This paper discusses the mechanisms available to R users for
integration of R into Windows applications and vice versa.

As an example for this integration, we will show how to utilize the
COM services provided by Excel from R and how to use R functionality
from within the spreadsheet's macro language VBA.