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diff --git a/Stars45/BaseScreen.h b/Stars45/BaseScreen.h
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+++ b/Stars45/BaseScreen.h
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+/*  Starshatter OpenSource Distribution
+    Copyright (c) 1997-2004, Destroyer Studios LLC.
+    All Rights Reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+      this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright notice,
+      this list of conditions and the following disclaimer in the documentation
+      and/or other materials provided with the distribution.
+    * Neither the name "Destroyer Studios" nor the names of its contributors
+      may be used to endorse or promote products derived from this software
+      without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
+
+    SUBSYSTEM:    Stars.exe
+    FILE:         BaseScreen.h
+    AUTHOR:       John DiCamillo
+
+*/
+
+#ifndef BaseScreen_h
+#define BaseScreen_h
+
+#include "Types.h"
+#include "Bitmap.h"
+#include "Screen.h"
+
+// +--------------------------------------------------------------------+
+
+class Screen;
+class Sim;
+class Window;
+class Font;
+class NavDlg;
+class MsnElemDlg;
+class AudDlg;
+class VidDlg;
+class ModDlg;
+class ModInfoDlg;
+class OptDlg;
+class CtlDlg;
+class KeyDlg;
+class JoyDlg;
+class MsgDlg;
+
+// +--------------------------------------------------------------------+
+
+class BaseScreen
+{
+public:
+    BaseScreen()                           { }
+    virtual ~BaseScreen()                  { }
+
+    virtual void         ShowNavDlg()      { }
+    virtual void         HideNavDlg()      { }
+    virtual bool         IsNavShown()      { return false; }
+    virtual NavDlg*      GetNavDlg()       { return 0; }
+
+    virtual void         ShowMsnElemDlg()  { }
+    virtual void         HideMsnElemDlg()  { }
+    virtual MsnElemDlg*  GetMsnElemDlg()   { return 0; }
+
+    virtual AudDlg*      GetAudDlg() const { return 0; }
+    virtual VidDlg*      GetVidDlg() const { return 0; }
+    virtual ModDlg*      GetModDlg() const { return 0; }
+    virtual ModInfoDlg*  GetModInfoDlg() const { return 0; }
+    virtual OptDlg*      GetOptDlg() const { return 0; }
+    virtual CtlDlg*      GetCtlDlg() const { return 0; }
+    virtual JoyDlg*      GetJoyDlg() const { return 0; }
+    virtual KeyDlg*      GetKeyDlg() const { return 0; }
+
+    virtual void         ShowAudDlg()      { }
+    virtual void         ShowVidDlg()      { }
+    virtual void         ShowModDlg()      { }
+    virtual void         ShowModInfoDlg()  { }
+    virtual void         ShowOptDlg()      { }
+    virtual void         ShowCtlDlg()      { }
+    virtual void         ShowJoyDlg()      { }
+    virtual void         ShowKeyDlg()      { }
+
+    virtual void         ShowMsgDlg()      { }
+    virtual void         HideMsgDlg()      { }
+    virtual bool         IsMsgShown()      { return false; }
+    virtual MsgDlg*      GetMsgDlg()       { return 0; }
+
+    virtual void         ApplyOptions()    { }
+    virtual void         CancelOptions()   { }
+};
+
+// +--------------------------------------------------------------------+
+
+#endif BaseScreen_h
+