Passing Command Line Options to Installer Custom Actions

[krose]

I have created an Installer using the "Setup Wizard" in Visual Studio.
I've added a custom action to this as a seperate DLL written in C#.

Everything is working and going well.

But now I want to add a "quite" mode that does not dislay any of the
UI. I can hide the automatically created UI by calling my .msi as
follows:

msiexec /passive /i Hamsters.msi

But how can I detect this "/passive" (or any other command line options
for that matter) from within my custom action?

Thanks
Kevin