Marshal class and security

From: Crirus (Crirus_at_datagroup.ro)
Date: 10/23/03 

Date: Thu, 23 Oct 2003 08:41:01 +0300

Hello

I need to make a internet ActiveX.
I have to use Marshal class to make some bitmap manipulations work faster.
What security I need in order to make it work?

CAn someone give me some short descriptions of each implication of a
security issue in my case?

Thanks,

Crirus