Add project files.

InjectionLibrary/Injector.cpp

@@ -0,0 +1,35 @@
+#include "pch.h"
+#include "Injector.h"
+
+namespace InjectLibrary
+{
+	HHOOK Injector::_hookHandle = nullptr;
+
+	Injector::Injector(const std::string& mutexName, int windowsMessage) : _mutexName(mutexName), _windowsMessage(windowsMessage)
+	{
+	}
+
+	void Injector::SetHook(const HINSTANCE moduleHandle)
+	{
+		if (moduleHandle) {
+			// <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD> <20><><EFBFBD> <20><> <20><><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD> 
+			HANDLE mutexHandle = CreateMutexA(nullptr, false, _mutexName.c_str());
+			if (GetLastError() != ERROR_ALREADY_EXISTS) {
+				_hookHandle = SetWindowsHookExA(_windowsMessage, (HOOKPROC)HookMessageProcedure, moduleHandle, 0);
+				_mutexHandle = mutexHandle;
+			}
+			else if (mutexHandle) {
+				CloseHandle(mutexHandle);
+			}
+		}
+		else {
+			UnhookWindowsHookEx(_hookHandle);
+			CloseHandle(_mutexHandle);
+		}
+	}
+
+	const LRESULT Injector::HookMessageProcedure(const DWORD code, const DWORD wParam, const DWORD lParam)
+	{
+		return CallNextHookEx(_hookHandle, code, wParam, lParam);
+	}
+}