Here's another idea - a bit kludgey as well, but what the heck:

   struct MyIDirectFB;
   class dfbScreen
   {
       MyIDirectFB* dfb;
       ...
   };

and in your .cpp:

   struct MyIDirectFB
   {
     IDirectFB data;
   };

Requires a bit more effort in coding, but as I said: what the heck...

Or you might cheat a bit on the compiler, using something like:

   #ifndef _DIRECTFB_H__INCLUDED_
     // (or whatever symbol directfb uses in the header)
     struct IDirectFB;
   #end
   class dfbScreen
   {
       IDirectFB* dfb;
       ...
   };

and include <directfb> from your implementation instead of from your 
header file.

There's more than one way to skin a cat...

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