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  This little macro can be used to improve portability between Windows
and MEWEL programs. In MEWEL, _DialogBox() is a macro defined as follows:

  #define _DialogBox(h,id,hWnd,pf)     DialogBox(LoadDialog(h,id,hWnd,pf))

In your source code, you can do the following :

  #ifdef MEWEL
  #include "window.h"
  #else
  #include <windows.h>
  #define _DialogBox   DialogBox
  #endif

      /*
         The following will work without change under both MEWEL and
         Microsoft Windows....
      */
      case IDM_ABOUT:
        lpProcAbout = MakeProcInstance(About, hInst);
        _DialogBox(hInst, "AboutBox", hWnd, lpProcAbout);
        FreeProcInstance(lpProcAbout);
        break;