smarter way of attaching using mutex

.gitignore

@@ -0,0 +1,3 @@
+x64\Release
+x64\Debug
+.vs

LibraryHijacker/dllmain.cpp

@@ -59,6 +59,34 @@ bool installHooks()
 	return true;
 }
 
+const char* mutexDetect = "hijackmutex1337";
+HANDLE hMutex;
+
+bool IsAlreadyInjected()
+{
+	hMutex = OpenMutexA(MUTEX_ALL_ACCESS, FALSE, mutexDetect);
+	if (hMutex)
+	{
+		CloseHandle(hMutex);
+		return true;
+	}
+
+	// The mutex does not exist, indicating the DLL is not injected yet
+	// Create the mutex to prevent further injections
+	HANDLE hNewMutex = CreateMutexA(NULL, TRUE, mutexDetect);
+	if (!hNewMutex)
+	{
+		// Failed to create mutex
+		// Handle the error appropriately
+	}
+
+	if (hNewMutex != 0)
+		CloseHandle(hNewMutex);
+
+	return false;
+}
+
+
 BOOL APIENTRY DllMain(HMODULE hModule,
 	DWORD  ul_reason_for_call,
 	LPVOID lpReserved
@@ -68,6 +96,12 @@ BOOL APIENTRY DllMain(HMODULE hModule,
 	switch (ul_reason_for_call)
 	{
 	case DLL_PROCESS_ATTACH:
+
+		if (IsAlreadyInjected())
+		{
+			MessageBoxA(NULL, "Do you want to crash your game? Seems like you like desktop!", "Injection Error", MB_ICONERROR);
+			return FALSE;
+		}
 		installHooks();
 		std::thread([]() {
 			if (hijacked)
@@ -76,14 +110,17 @@ BOOL APIENTRY DllMain(HMODULE hModule,
 				{
 					MH_Uninitialize();
 					HMODULE hModule = GetModuleHandle(NULL);
+					ReleaseMutex(hMutex);
 					FreeLibraryAndExitThread(hModule, 0);
 				}
 			}
 			}).detach();
 		break;
 	case DLL_THREAD_ATTACH:
 	case DLL_THREAD_DETACH:
+		ReleaseMutex(hMutex);
 	case DLL_PROCESS_DETACH:
+		ReleaseMutex(hMutex);
 		break;
 	}
 	return TRUE;

LibraryHijacker/x64/Release/LibraryHijacker.dll.recipe

@@ -2,7 +2,7 @@
 <Project>
   <ProjectOutputs>
     <ProjectOutput>
-      <FullPath>C:\Users\righe\Desktop\LibraryHijacker\x64\Release\LibraryHijacker.dll</FullPath>
+      <FullPath>C:\Users\user\Documents\GitHub\D3D-HIjacker\x64\Release\LibraryHijacker.dll</FullPath>
     </ProjectOutput>
   </ProjectOutputs>
   <ContentFiles />

LibraryHijacker/x64/Release/LibraryHijacker.log

@@ -1,7 +1,7 @@
-  dllmain.cpp
-  Generating code
-  36 of 148 functions (24.3%) were compiled, the rest were copied from previous compilation.
-    33 functions were new in current compilation
-    0 functions had inline decision re-evaluated but remain unchanged
-  Finished generating code
-  LibraryHijacker.vcxproj -> C:\Users\righe\Desktop\LibraryHijacker\x64\Release\LibraryHijacker.dll
+  pch.cpp
+  dllmain.cpp
+  Generazione codice in corso...
+  Previous IPDB was built with incompatible compiler, fall back to full compilation.
+  All 148 functions were compiled because no usable IPDB/IOBJ from previous compilation was found.
+  Generazione codice terminata
+  LibraryHijacker.vcxproj -> C:\Users\user\Documents\GitHub\D3D-HIjacker\x64\Release\LibraryHijacker.dll

LibraryHijacker/x64/Release/LibraryHijacker.tlog/Cl.items.tlog

@@ -0,0 +1,2 @@
+C:\Users\user\Documents\GitHub\D3D-HIjacker\LibraryHijacker\dllmain.cpp;C:\Users\user\Documents\GitHub\D3D-HIjacker\LibraryHijacker\x64\Release\dllmain.obj
+C:\Users\user\Documents\GitHub\D3D-HIjacker\LibraryHijacker\pch.cpp;C:\Users\user\Documents\GitHub\D3D-HIjacker\LibraryHijacker\x64\Release\pch.obj

LibraryHijacker/x64/Release/LibraryHijacker.tlog/LibraryHijacker.lastbuildstate

@@ -1,2 +1,2 @@
-PlatformToolSet=v143:VCToolArchitecture=Native64Bit:VCToolsVersion=14.34.31933:TargetPlatformVersion=10.0.22621.0:VcpkgTriplet=x64-windows:
-Release|x64|C:\Users\righe\Desktop\LibraryHijacker\|
+PlatformToolSet=v143:VCToolArchitecture=Native64Bit:VCToolsVersion=14.36.32532:TargetPlatformVersion=10.0.22000.0:
+Release|x64|C:\Users\user\Documents\GitHub\D3D-HIjacker\|