Reversing Mixed Mode (Managed/Unmanaged) .Net Exes

[oracle]

Hi Pros,

hats off to all senior RCE pros over here, and thanks a ton for the learnings offered to amateur like...

here come my long time kept query,
In a situation where as a Single MSIL Executable contains both Managed and UnManaged Code, in this case reversing of Managed Code is as simple as reversing a pure managed code with Reflector but how it is to reverse the UnManaged Code Chunks from that Mixed Executable...

It would be greatfull to see a tutorial on this...

Here is the link containing sample mixed code.

http://rapidshare.com/files/145118471/RxSpiy.rar.html

Thanks again Pros... do keep flying...