How to walk through directory tree step by step?

I found many examples on walking through directory tree, but I need something a little different. I need a class with some method which each call returns one file from directory and gradually walking through directory tree. How can I do this please? I am using functions FindFirstFile, FindNextFile and FindClose, I am newbie in c++. I have something like this...

For example I have this tree

Parent(folder)\
   file1.txt
   file2.txt
   Child(folder)\
       file3.txt
       file4.txt

and I need a class with a method for example getNextFile(), that first call returns file1.txt; second call returns file2.txt, third call returns Child(folder), fourth call returns file3.txt and so on...

WIN32_FIND_DATA fdFile;
HANDLE hFind = NULL;
if((hFind = FindFirstFile(sPath, &fdFile)) == INVALID_HANDLE_VALUE)
{
    return false;
}
do
{
    //do some job with fdFile
}
while(FindNextFile(hFind, &fdFile));