Pass windows access token from one process to another

Hi all,

I am stuck with a windows security problem.This might not be the right place to place my question but I think its related to some networking concepts.

I used LogOnUser API call in one application to obtain access token.Now after obtaining the access token I want to pass this access token to another process.My problem is that the token is valid in current process and any threads in the current process.but if i try to pass this token from one process to another process the token becomes invalid.Any idea on this...

Thanks in advance,
Muffy.