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/DecalSupportLibraries/Attic/DecalSupportLibraries.cpp

@@ -0,0 +1,105 @@
+// DecalSupportLibraries.cpp : Defines the class behaviors for the application.
+//
+
+#include "stdafx.h"
+#include "DecalSupportLibraries.h"
+#include "DecalSupportLibrariesDlg.h"
+
+#ifdef _DEBUG
+#define new DEBUG_NEW
+#endif
+
+
+// CDecalSupportLibrariesApp
+
+BEGIN_MESSAGE_MAP(CDecalSupportLibrariesApp, CWinApp)
+	ON_COMMAND(ID_HELP, CWinApp::OnHelp)
+END_MESSAGE_MAP()
+
+
+// CDecalSupportLibrariesApp construction
+
+CDecalSupportLibrariesApp::CDecalSupportLibrariesApp()
+{
+	// TODO: add construction code here,
+	// Place all significant initialization in InitInstance
+}
+
+
+// The one and only CDecalSupportLibrariesApp object
+
+CDecalSupportLibrariesApp theApp;
+
+const GUID CDECL BASED_CODE _tlid =
+		{ 0x24241FCB, 0x6DD4, 0x4B97, { 0x8C, 0x1F, 0x88, 0xA2, 0x30, 0x84, 0xAF, 0xA5 } };
+const WORD _wVerMajor = 1;
+const WORD _wVerMinor = 0;
+
+
+// CDecalSupportLibrariesApp initialization
+
+BOOL CDecalSupportLibrariesApp::InitInstance()
+{
+	// InitCommonControls() is required on Windows XP if an application
+	// manifest specifies use of ComCtl32.dll version 6 or later to enable
+	// visual styles.  Otherwise, any window creation will fail.
+	InitCommonControls();
+
+	CWinApp::InitInstance();
+
+	// Initialize OLE libraries
+	if (!AfxOleInit())
+	{
+		AfxMessageBox(IDP_OLE_INIT_FAILED);
+		return FALSE;
+	}
+
+	AfxEnableControlContainer();
+
+	// Parse command line for automation or reg/unreg switches.
+	CCommandLineInfo cmdInfo;
+	ParseCommandLine(cmdInfo);
+
+	// App was launched with /Embedding or /Automation switch.
+	// Run app as automation server.
+	if (cmdInfo.m_bRunEmbedded || cmdInfo.m_bRunAutomated)
+	{
+		// Register class factories via CoRegisterClassObject().
+		COleTemplateServer::RegisterAll();
+	}
+	// App was launched with /Unregserver or /Unregister switch.  Remove
+	// entries from the registry.
+	else if (cmdInfo.m_nShellCommand == CCommandLineInfo::AppUnregister)
+	{
+		COleObjectFactory::UpdateRegistryAll(FALSE);
+		AfxOleUnregisterTypeLib(_tlid, _wVerMajor, _wVerMinor);
+		return FALSE;
+	}
+	// App was launched standalone or with other switches (e.g. /Register
+	// or /Regserver).  Update registry entries, including typelibrary.
+	else
+	{
+		COleObjectFactory::UpdateRegistryAll();
+		AfxOleRegisterTypeLib(AfxGetInstanceHandle(), _tlid);
+		if (cmdInfo.m_nShellCommand == CCommandLineInfo::AppRegister)
+			return FALSE;
+	}
+
+	CDecalSupportLibrariesDlg dlg;
+	m_pMainWnd = &dlg;
+	INT_PTR nResponse = dlg.DoModal();
+	if (nResponse == IDOK)
+	{
+		// TODO: Place code here to handle when the dialog is
+		//  dismissed with OK
+	}
+	else if (nResponse == IDCANCEL)
+	{
+		// TODO: Place code here to handle when the dialog is
+		//  dismissed with Cancel
+	}
+
+	// Since the dialog has been closed, return FALSE so that we exit the
+	//  application, rather than start the application's message pump.
+	return FALSE;
+}