determining the topmost window on a windows computer

[f0rest]

How would I go about doing this? Thanks.

 

[Lew]

How would I go about doing this? Thanks.

You posted this same question already, and you did so with much better detail
in the body of the message. The repost was both redundant and fragmentary in
a way that makes it hard to respond. You really only need to post your
question once; if people are going to answer, they prefer to have just one
place to do it. If not, reposts only make them annoyed and don't help you.