In-proc 和 Out-proc 的区别

In-proc - Com object is present within application process 

Out-Proc - Com object has it's own process area

In-proc - E.g. Activex Dll 

Out-Proc - E.g. Activex exe

In-proc - Faster 

Out-Proc - Comparitively slower

In-proc - Useful for local com 

Out-Proc - Useful for remote com

P.S: 

http://wiki.answers.com/Q/What_is_the_difference_between_in-proc_and_out-of-proc