[R] RExcel foreground and background server

[Irina Ursachi]

Dear all,

I have a question regarding background and foreground server in RExcel:
Can somebody explain the main difference between them? As far as I
understood from the RExcel webpage, for both of them one  needs rights
for access to Windows registries. The only difference that I can see so
far is that for the installation of the background server, one needs the
R(D)COM package, whereas for the foreground server installation, the
rcom package is required.

Further more, does anyone know, how Excel proccesses and R processes
communicate? Is it possible for more than one Excel-process to
communicate with more than one R process?

Thank you in advance!

Best regards,
Irina Ursachi.