bigly changes (see description)

- use LdrRegisterDllNotification instead of LoadLibraryExW for patching
** LoadLibraryExW is currently still hooked for the UpdatePack7 compatibility fix, I'm looking into other alternatives
- more robust error checking
- refactored a lot of code to be more reusable
- header guards
- better logging framework
- tighter permissions on the unload event
- probably other stuff I forgot about

wufuc_aihelper/aihelper.c

@@ -2,9 +2,10 @@
 #include <Msiquery.h>
 #include <tchar.h>
 
+__declspec(dllexport)
 UINT __stdcall AIHelper_SetUnloadEvent(MSIHANDLE hInstall) {
     HANDLE hEvent = OpenEvent(EVENT_MODIFY_STATE, FALSE, _T("Global\\wufuc_UnloadEvent"));
-    if (hEvent) {
+    if ( hEvent ) {
         SetEvent(hEvent);
         CloseHandle(hEvent);
     }

wufuc_aihelper/dllmain.c

@@ -1,7 +1,7 @@
 #include <Windows.h>
 
 BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
-    switch (ul_reason_for_call) {
+    switch ( ul_reason_for_call ) {
     case DLL_PROCESS_ATTACH:
         break;
     case DLL_PROCESS_DETACH:

wufuc_aihelper/exports.def

@@ -1,2 +0,0 @@
-EXPORTS
-	AIHelper_SetUnloadEvent

wufuc_aihelper/wufuc_aihelper.vcxproj

@@ -111,7 +111,6 @@
       <OptimizeReferences>true</OptimizeReferences>
       <AdditionalDependencies>Msi.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <GenerateDebugInformation>false</GenerateDebugInformation>
-      <ModuleDefinitionFile>exports.def</ModuleDefinitionFile>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
@@ -123,7 +122,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
-      <ModuleDefinitionFile>exports.def</ModuleDefinitionFile>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -135,7 +133,6 @@
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
-      <ModuleDefinitionFile>exports.def</ModuleDefinitionFile>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -153,16 +150,12 @@
       <OptimizeReferences>true</OptimizeReferences>
       <AdditionalDependencies>Msi.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <GenerateDebugInformation>false</GenerateDebugInformation>
-      <ModuleDefinitionFile>exports.def</ModuleDefinitionFile>
     </Link>
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClCompile Include="aihelper.c" />
     <ClCompile Include="dllmain.c" />
   </ItemGroup>
-  <ItemGroup>
-    <None Include="exports.def" />
-  </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>