This is an example of how to get a list of posts on a users wall and read any comments on those posts. You can also request comments for a specific post.
Imports Branches.FBAPI
...
Dim SI As New SessionInfo("[access_token]"))
Dim Req New Functions.Requests(SI)
For Each P In Req.GetPosts("me")
TestContext.WriteLine(P.id)
TestContext.WriteLine(P.from.name)
TestContext.WriteLine(P.message)
TestContext.WriteLine(P.link)
TestContext.WriteLine(P.comments.count)
'Return comments from data on post
For Each C In P.comments.data
TestContext.WriteLine(C.from.name)
TestContext.WriteLine("Comment: " & C.message)
Next
'Return comments for a specific postID
Dim C2 = Req.GetComments(P.id)
For Each C In C2
TestContext.WriteLine(C.from.name)
TestContext.WriteLine("Comment: " & C.message)
Next
Next
The above emaple is based on unit testing code