Initial commit: Complete open-source Decal rebuild

All 5 phases of the open-source Decal rebuild:

Phase 1: 14 decompiled .NET projects (Interop.*, Adapter, FileService, DecalUtil)
Phase 2: 10 native DLLs rewritten as C# COM servers with matching GUIDs
  - DecalDat, DHS, SpellFilter, DecalInput, DecalNet, DecalFilters
  - Decal.Core, DecalControls, DecalRender, D3DService
Phase 3: C++ shims for Inject.DLL (D3D9 hooking) and LauncherHook.DLL
Phase 4: DenAgent WinForms tray application
Phase 5: WiX installer and build script

25 C# projects building with 0 errors.
Native C++ projects require VS 2022 + Windows SDK (x86).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Native/DecalControls/BorderLayout.h

@@ -0,0 +1,73 @@
+// BorderLayout.h : Declaration of the cBorderLayout
+
+#ifndef __BORDERLAYOUT_H_
+#define __BORDERLAYOUT_H_
+
+#include "resource.h"       // main symbols
+#include "DecalControlsCP.h"
+
+#include "ControlImpl.h"
+
+/////////////////////////////////////////////////////////////////////////////
+// cBorderLayout
+class ATL_NO_VTABLE cBorderLayout : 
+	public CComObjectRootEx<CComMultiThreadModel>,
+	public CComCoClass<cBorderLayout, &CLSID_BorderLayout>,
+   public ILayerImpl< cBorderLayout >,
+   public ILayoutImpl< cBorderLayout, IBorderLayout, &IID_ILayout, &LIBID_DecalControls >,
+   public IProvideClassInfo2Impl< &CLSID_BorderLayout, &DIID_IControlEvents, &LIBID_DecalControls >,
+	public IConnectionPointContainerImpl<cBorderLayout>,
+	public CProxyIControlEvents< cBorderLayout >
+{
+public:
+	cBorderLayout()
+      : m_nCenterID( -1 )
+	{
+	}
+
+   // Data members
+   struct cEdgePlacement
+   {
+      eBorderEdge m_edge;
+      long m_nSize;
+      long m_nID;
+   };
+
+   typedef std::list< cEdgePlacement > cEdgePlacementList;
+   cEdgePlacementList m_edges;
+   long m_nCenterID;
+
+   void onChildDestroy( long nID );
+   void onSchemaLoad( IView *pView, MSXML::IXMLDOMElementPtr &pElement );
+
+DECLARE_REGISTRY_RESOURCEID(IDR_BORDERLAYOUT)
+
+DECLARE_PROTECT_FINAL_CONSTRUCT()
+
+BEGIN_COM_MAP(cBorderLayout)
+   COM_INTERFACE_ENTRY(ILayerRender)
+   COM_INTERFACE_ENTRY(ILayer)
+   COM_INTERFACE_ENTRY(ILayerSchema)
+   COM_INTERFACE_ENTRY(IDispatch)
+   COM_INTERFACE_ENTRY(IControl)
+   COM_INTERFACE_ENTRY(ILayout)
+	COM_INTERFACE_ENTRY(IBorderLayout)
+   COM_INTERFACE_ENTRY(IProvideClassInfo)
+   COM_INTERFACE_ENTRY(IProvideClassInfo2)
+	COM_INTERFACE_ENTRY_IMPL(IConnectionPointContainer)
+END_COM_MAP()
+
+BEGIN_CONNECTION_POINT_MAP(cBorderLayout)
+CONNECTION_POINT_ENTRY(DIID_IControlEvents)
+END_CONNECTION_POINT_MAP()
+
+public:
+   // IBorderLayout Methods
+	STDMETHOD(CreateCenter)(ILayer *pSink);
+	STDMETHOD(CreateEdge)(eBorderEdge eEdge, long nSize, ILayer *pSink);
+
+   // ILayerRender Methods
+   STDMETHOD(Reformat)();
+};
+
+#endif //__BORDERLAYOUT_H_