🚀 go-pugleaf

Reposting: I am not sure it really went out...

I am having problem accessing Dialog Boxes gathered in a 
special DLL with all resources, from my main program.
A resource only DLL is described in Petzold...
I have no problem with menus... It works fine as described

In WM_CREATE:

          if ((hLibrary = LoadLibrary ("RESOURCE.DLL")) < 32 ) {
            MessageBeep (0);
          } else {
            hMenu = LoadMenu(hLibrary, "MyMenu");
          }
          SetMenu(hWnd, hMenu);

But how do I access the Dialog Box?

In a IDM message:

          lpProcAbout = MakeProcInstance(About, hInst);
          DialogBox(hLibrary, "About", hWnd, lpProcAbout);
          FreeProcInstance(lpProcAbout);

What am I missing? Should this work? If not how can I do?
No LoadDialog function... what ways around it? 
Any help will be appreciated.