Difference between application manifest and assembly manifest

Question

What is the difference between application manifest and assembly manifest? Where is each one used? Which one of the two is found in .dll or .exe resources? (or both can be there? ).

Sorry if its too many questions at once, but if anyone can explain this to me it would be really helpful. The reason i'm asking this is that i want to be able to extract information from manifests embedded in PE files. I found these descriptions of manifests, but there are two and i'm not sure which one to follow:

Application manifest description
Assembly manifest description

EDIT: and no, i do not want to use any API calls. I'm writting it all myself.

Answer 1

It seems that i will have to follow both:

As a resource in a DLL, the assembly is available for the private use of the DLL. An assembly manifest cannot be included as a resource in an EXE. An EXE file may include an application manifest as a resource.

(Information found here). So it seems that executables have application manifests embedded in resources and libraries (DLL) have assembly manifests. Since both of them are PE (portable executable), i will need to parse both types.