[Dev-C++] wxMemoryFSHandler content dir

Hi guys,

I'm using wxMemoryFSHandler to load in memory a variable number of images from 
a user selected location, resize them appropriately and display them in a 
wxHtml window.

All works fine, but once the html page is correctly displayed I need to clear 
the memory filesystem content. So I tried to do it looping on the files 
retrieving the first file name using FindFirst(), i.e.:

------------ CODE -------------------------
wxMemoryFSHandler* MFSH = new wxMemoryFSHandler;
wxFileSystem::AddHandler(MFSH);

// fill MFSH with the images and display them

......

// all works fine

wxString FileToDelete = MFSH->FindFirst("*");

----------- END CODE --------------------

Now FileToDelete is empty!! I tried also

MFSH->FindFirst("*", wxFILE);
MFSH->FindFirst("*.*");
MFSH->FindFirst("*.*", wxFILE);

but FileToDelete is always empty.

Any idea?

Thnks in advance.

kalb