We have a black box Win32 DLL that provides an interface to a
proprietary flat file system (list files, get file info, create file,
delete file, open/read/write/close a file). As a minimum, we need to
make this file system accessible from the Windows Explorer - is there
a way to do it ? Ideally, we would like to make the file system
visible to Windows as a whole, which will probbaly require accessing
the DLL from the driver level, so this is probably not feasible at all
- am I correct ? Thanks.

I'm creating a window like so:
// the handle for the window, filled by a function

HWND hWnd;

// this struct holds information for the window class

WNDCLASSEX wc;

// clear out the window class for use

ZeroMemory(&wc, sizeof(WNDCLASSEX));

// fill in the struct with the needed information

wc.cbSize = sizeof(WNDCLASSEX);

wc.style = CS_HREDRAW | CS_VREDRAW;

wc.lpfnWndProc = WindowProc;

wc.hInstance = hInstance;

wc.hCursor = LoadCursor(NULL, IDC_ARROW);

wc.hbrBackground = (HBRUSH)COLOR_WINDOW;

wc.lpszClassName = TEXT("Open2DWindowClass");

// register the window class

if(!RegisterClassEx(&wc))

{

MessageBox(NULL, "Window Registration Failed!", "Error!",