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>

Installer/Installer.nsi

@@ -0,0 +1,161 @@
+; Script generated with the Venis Install Wizard
+
+; Define your application name
+!define APPNAME "Decal"
+!define APPNAMEANDVERSION "Decal 2.6.1.0"
+
+; Main Install settings
+Name "${APPNAMEANDVERSION}"
+InstallDir "$PROGRAMFILES\Decal"
+InstallDirRegKey HKLM "Software\${APPNAME}" ""
+OutFile "Decal2610.exe"
+
+; Use compression
+SetCompressor LZMA
+
+; Modern interface settings
+!include "MUI.nsh"
+
+!define MUI_ABORTWARNING
+
+!insertmacro MUI_PAGE_WELCOME
+!insertmacro MUI_PAGE_COMPONENTS
+!insertmacro MUI_PAGE_DIRECTORY
+!insertmacro MUI_PAGE_INSTFILES
+!insertmacro MUI_PAGE_FINISH
+
+!insertmacro MUI_UNPAGE_CONFIRM
+!insertmacro MUI_UNPAGE_INSTFILES
+
+; Set languages (first is default language)
+!insertmacro MUI_LANGUAGE "English"
+!insertmacro MUI_RESERVEFILE_LANGDLL
+
+Section "" DecalCoreSection
+
+	; Set Section properties
+	SetOverwrite on
+
+	; Set Section Files and Shortcuts
+	SetOutPath "$INSTDIR\"
+
+	File "Release\Switch-Active.bmp"
+	File "Release\Switch-Inactive.bmp"
+	File "Release\Switchbar Disabled.bmp"
+	File "Release\Switchbar Template.bmp"
+	File "Release\Tab-Active.bmp"
+	File "Release\Tab-Inactive.bmp"
+
+	File "Release\Decal.dll"
+	File "Release\DecalControls.dll"
+	File "Release\DecalDat.dll"
+	File "Release\DecalFilters.dll"
+	File "Release\DecalInput.dll"
+	File "Release\DecalNet.dll"
+	File "Release\DenAgent.exe"
+	File "Release\ForceLibrary.dll"
+	File "Release\Inject.dll"
+	File "Release\LobbyHook.dll"
+	File "Release\MapObject.bmp"
+	File "Release\PlainText.dll"
+
+	SetOutPath "$SYSDIR\"
+	File "Release\LobbyHook.dll"
+
+	RegDLL "$INSTDIR\Decal.dll"
+  RegDLL "$INSTDIR\Inject.dll"
+  RegDLL "$INSTDIR\DecalControls.dll"
+  RegDLL "$INSTDIR\DecalDat.dll"
+  RegDLL "$INSTDIR\DecalNet.dll"
+  RegDLL "$INSTDIR\DecalFilters.dll"
+  RegDLL "$INSTDIR\DecalInput.dll"
+  RegDLL "$INSTDIR\PlainText.dll"
+	
+SectionEnd
+
+Section "Desktop Shortcut" DesktopSection
+
+	CreateShortCut "$DESKTOP\Decal Agent.lnk" "$INSTDIR\DenAgent.exe"
+
+SectionEnd
+
+Section "Start Menu Entry" SMSection
+
+	CreateDirectory "$SMPROGRAMS\Decal"
+	CreateShortCut "$SMPROGRAMS\Decal\Decal Agent.lnk" "$INSTDIR\DenAgent.exe"
+	CreateShortCut "$SMPROGRAMS\Decal\Uninstall.lnk" "$INSTDIR\uninstall.exe"
+
+SectionEnd
+
+Section "Quick Launch Shortcut" QLSection
+
+	CreateShortCut "$QUICKLAUNCH\Decal Agent.lnk" "$INSTDIR\DenAgent.exe"
+
+SectionEnd
+
+Section -FinishSection
+
+	WriteRegStr HKLM "Software\${APPNAME}" "" "$INSTDIR"
+	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APPNAME}" "DisplayName" "${APPNAME}"
+	WriteRegStr HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APPNAME}" "UninstallString" "$INSTDIR\uninstall.exe"
+	WriteUninstaller "$INSTDIR\uninstall.exe"
+
+SectionEnd
+
+; Modern install component descriptions
+!insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN
+	!insertmacro MUI_DESCRIPTION_TEXT ${Section1} ""
+!insertmacro MUI_FUNCTION_DESCRIPTION_END
+
+;Uninstall section
+Section Uninstall
+
+	;Remove from registry...
+	DeleteRegKey HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APPNAME}"
+	DeleteRegKey HKLM "SOFTWARE\${APPNAME}"
+
+	; Delete self
+	Delete "$INSTDIR\uninstall.exe"
+
+	; Delete Shortcuts
+	Delete "$DESKTOP\Decal.lnk"
+	Delete "$SMPROGRAMS\Decal\Decal.lnk"
+	Delete "$SMPROGRAMS\Decal\Uninstall.lnk"
+	
+	; Unregister DLLS
+  UnRegDLL "$INSTDIR\Decal.dll"
+  UnRegDLL "$INSTDIR\Inject.dll"
+  UnRegDLL "$INSTDIR\DecalControls.dll"
+  UnRegDLL "$INSTDIR\DecalDat.dll"
+  UnRegDLL "$INSTDIR\DecalNet.dll"
+  UnRegDLL "$INSTDIR\DecalFilters.dll"
+  UnRegDLL "$INSTDIR\DecalInput.dll"
+  UnRegDLL "$INSTDIR\PlainText.dll"
+
+	; Clean up Decal
+	Delete "$INSTDIR\Decal.dll"
+	Delete "$INSTDIR\DecalControls.dll"
+	Delete "$INSTDIR\DecalDat.dll"
+	Delete "$INSTDIR\DecalFilters.dll"
+	Delete "$INSTDIR\DecalInput.dll"
+	Delete "$INSTDIR\DecalNet.dll"
+	Delete "$INSTDIR\DenAgent.exe"
+	Delete "$INSTDIR\ForceLibrary.dll"
+	Delete "$INSTDIR\Inject.dll"
+	Delete "$INSTDIR\LobbyHook.dll"
+	Delete "$INSTDIR\MapObject.bmp"
+	Delete "$INSTDIR\PlainText.dll"
+	Delete "$INSTDIR\Switch-Active.bmp"
+	Delete "$INSTDIR\Switch-Inactive.bmp"
+	Delete "$INSTDIR\Switchbar Disabled.bmp"
+	Delete "$INSTDIR\Switchbar Template.bmp"
+	Delete "$INSTDIR\Tab-Active.bmp"
+	Delete "$INSTDIR\Tab-Inactive.bmp"
+
+	; Remove remaining directories
+	RMDir "$SMPROGRAMS\Decal"
+	RMDir "$INSTDIR\"
+
+SectionEnd
+
+; eof