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/DecalFilters/Attic/Location.cpp

@@ -0,0 +1,36 @@
+// Location.cpp : Implementation of cLocation
+#include "stdafx.h"
+#include "DecalFilters.h"
+#include "Location.h"
+
+/////////////////////////////////////////////////////////////////////////////
+// cLocation
+
+
+STDMETHODIMP cLocation::get_Landblock(long *pVal)
+{
+   if (pVal == NULL) {
+      _ASSERT(FALSE);
+      return E_POINTER;
+   }
+
+	*pVal = m_dwLandblock;
+	return S_OK;
+}
+
+STDMETHODIMP cLocation::Offset(float *x, float *y, float *z)
+{
+	*x = m_fxOffset;
+	*y = m_fyOffset;
+	*z = m_fzOffset;
+	return S_OK;
+}
+
+STDMETHODIMP cLocation::Heading(float *x, float *y, float *z, float *w)
+{
+	*x = m_fxHeading;
+	*y = m_fyHeading;
+	*z = m_fzHeading;
+	*w = m_fwHeading;
+	return S_OK;
+}

Native/DecalFilters/Attic/Location.h

@@ -0,0 +1,56 @@
+// Location.h : Declaration of the cLocation
+
+#ifndef __LOCATION_H_
+#define __LOCATION_H_
+
+#include "resource.h"       // main symbols
+
+/////////////////////////////////////////////////////////////////////////////
+// cLocation
+class ATL_NO_VTABLE cLocation : 
+	public CComObjectRootEx<CComSingleThreadModel>,
+	public CComCoClass<cLocation, &CLSID_Location>,
+	public IDispatchImpl<ILocation, &IID_ILocation, &LIBID_DecalFilters>
+{
+public:
+	cLocation()
+	{
+		m_dwLandblock = 0;
+
+		m_fxOffset = 0.0f;
+		m_fyOffset = 0.0f;
+		m_fzOffset = 0.0f;
+
+		m_fxHeading = 0.0f;
+		m_fyHeading = 0.0f;
+		m_fzHeading = 0.0f;
+		m_fwHeading = 0.0f;
+	}
+
+DECLARE_REGISTRY_RESOURCEID(IDR_LOCATION)
+
+DECLARE_PROTECT_FINAL_CONSTRUCT()
+
+BEGIN_COM_MAP(cLocation)
+	COM_INTERFACE_ENTRY(ILocation)
+	COM_INTERFACE_ENTRY(IDispatch)
+END_COM_MAP()
+
+// ILocation
+public:
+	STDMETHOD(Heading)(float *x, float *y, float *z, float *w);
+	STDMETHOD(Offset)(float *x, float *y, float *z);
+	STDMETHOD(get_Landblock)(/*[out, retval]*/ long *pVal);
+	long m_dwLandblock;
+
+	float m_fxOffset;
+	float m_fyOffset;
+	float m_fzOffset;
+
+	float m_fxHeading;
+	float m_fyHeading;
+	float m_fzHeading;
+	float m_fwHeading;
+};
+
+#endif //__LOCATION_H_

Native/DecalFilters/Attic/Location.rgs

@@ -0,0 +1,26 @@
+HKCR
+{
+	DecalFilters.Location.1 = s 'Location Class'
+	{
+		CLSID = s '{4031CDC0-FC4F-428F-B98A-ACAFA6CF19FB}'
+	}
+	DecalFilters.Location = s 'Location Class'
+	{
+		CLSID = s '{4031CDC0-FC4F-428F-B98A-ACAFA6CF19FB}'
+		CurVer = s 'DecalFilters.Location.1'
+	}
+	NoRemove CLSID
+	{
+		ForceRemove {4031CDC0-FC4F-428F-B98A-ACAFA6CF19FB} = s 'Location Class'
+		{
+			ProgID = s 'DecalFilters.Location.1'
+			VersionIndependentProgID = s 'DecalFilters.Location'
+			ForceRemove 'Programmable'
+			InprocServer32 = s '%MODULE%'
+			{
+				val ThreadingModel = s 'Apartment'
+			}
+			'TypeLib' = s '{DA16DAA9-7F16-45D9-A59F-8C45A7F2ACB1}'
+		}
+	}
+}

Native/DecalFilters/Attic/Stackable.cpp

@@ -0,0 +1,8 @@
+// Stackable.cpp : Implementation of cStackable
+#include "stdafx.h"
+#include "DecalFilters.h"
+#include "Stackable.h"
+
+/////////////////////////////////////////////////////////////////////////////
+// cStackable
+

Native/DecalFilters/Attic/Stackable.h

@@ -0,0 +1,33 @@
+// Stackable.h : Declaration of the cStackable
+
+#ifndef __STACKABLE_H_
+#define __STACKABLE_H_
+
+#include "resource.h"       // main symbols
+
+/////////////////////////////////////////////////////////////////////////////
+// cStackable
+class ATL_NO_VTABLE cStackable : 
+	public CComObjectRootEx<CComSingleThreadModel>,
+	public CComCoClass<cStackable, &CLSID_Stackable>,
+	public IDispatchImpl<IStackable, &IID_IStackable, &LIBID_DecalFilters>
+{
+public:
+	cStackable()
+	{
+	}
+
+DECLARE_REGISTRY_RESOURCEID(IDR_STACKABLE)
+
+DECLARE_PROTECT_FINAL_CONSTRUCT()
+
+BEGIN_COM_MAP(cStackable)
+	COM_INTERFACE_ENTRY(IStackable)
+	COM_INTERFACE_ENTRY(IDispatch)
+END_COM_MAP()
+
+// IStackable
+public:
+};
+
+#endif //__STACKABLE_H_

Native/DecalFilters/Attic/Stackable.rgs

@@ -0,0 +1,26 @@
+HKCR
+{
+	DecalFilters.Stackable.1 = s 'Stackable Class'
+	{
+		CLSID = s '{414EF2D6-E74F-4998-A2C7-26517162744E}'
+	}
+	DecalFilters.Stackable = s 'Stackable Class'
+	{
+		CLSID = s '{414EF2D6-E74F-4998-A2C7-26517162744E}'
+		CurVer = s 'DecalFilters.Stackable.1'
+	}
+	NoRemove CLSID
+	{
+		ForceRemove {414EF2D6-E74F-4998-A2C7-26517162744E} = s 'Stackable Class'
+		{
+			ProgID = s 'DecalFilters.Stackable.1'
+			VersionIndependentProgID = s 'DecalFilters.Stackable'
+			ForceRemove 'Programmable'
+			InprocServer32 = s '%MODULE%'
+			{
+				val ThreadingModel = s 'Apartment'
+			}
+			'TypeLib' = s '{DA16DAA9-7F16-45D9-A59F-8C45A7F2ACB1}'
+		}
+	}
+}