get the list of subkeys under a specific key

[C++ Programming]

I try to read the names of keys (folders) mean subkeys under a specific key like this :

https://docs.google.com/View?docID=dg58dwx6_49fms8pdfx&revision=_latest[^ (https://docs.google.com/View?docID=dg58dwx6_49fms8pdfx&revision=_latest)]

So for example if i would have the list of subkeys (.htm, .html, .jpe ...) how can i do it? http://www.barakasoft.com/script/Forums/Images/smiley_line.gif

Thank you.