diff --git a/src/example/main.cpp b/src/example/main.cpp
index 6ee9bbb..242bb02 100644
--- a/src/example/main.cpp
+++ b/src/example/main.cpp
@@ -7,17 +7,17 @@ using namespace sf;
 class MyScreen : public IScreen
 {
 public:
-	virtual void OnFocus() override
+	void OnFocus(IWindow* parent) override
 	{
 		printf("Received Focus\n");
 	}
 
-	virtual void OnDefocus() override
+	void OnDefocus() override
 	{
 		printf("Lost Focus\n");
 	}
 
-	virtual void OnRender(SDL_Renderer* renderer) override
+	void OnRender(SDL_Renderer* renderer) override
 	{
 		SDL_SetRenderDrawColor(renderer, 0, 0, 255, 255);
 		SDL_RenderClear(renderer);
diff --git a/src/sdlf/Screen.hpp b/src/sdlf/Screen.hpp
index fe90342..4491e1f 100644
--- a/src/sdlf/Screen.hpp
+++ b/src/sdlf/Screen.hpp
@@ -11,9 +11,9 @@ namespace sf
 	public:
 		virtual void OnFocus(IWindow* parent) { }
 		virtual void OnDefocus() { }
-		virtual bool OnUpdate(double frametime) override { return true; }
-		virtual bool OnEvent(const SDL_Event& event) override { return true; }
-		virtual void OnRender(SDL_Renderer* renderer) override {}	
+		bool OnUpdate(double frametime) override { return true; }
+		bool OnEvent(const SDL_Event& event) override { return true; }
+		void OnRender(SDL_Renderer* renderer) override {}	
 
 	protected:
 		IScreen() = default;
diff --git a/src/sdlf/Window.cpp b/src/sdlf/Window.cpp
index cd4bb50..55e67d1 100644
--- a/src/sdlf/Window.cpp
+++ b/src/sdlf/Window.cpp
@@ -51,7 +51,6 @@ namespace sf
 		m_oEventFunction = std::bind(&IWindow::OnEvent, this, std::placeholders::_1);
 		m_oUpdateFunction = std::bind<bool>(&IWindow::OnUpdate, this, std::placeholders::_1);
 		m_oRenderFunction = std::bind(&IWindow::OnRender, this, std::placeholders::_1);
-
 	}
 
 	void IWindow::Destroy()
@@ -78,7 +77,6 @@ namespace sf
 
 		if(m_oMsgLoopThread.joinable())
 			m_oMsgLoopThread.join();
-
 	}
 
 	void IWindow::AddEventCallback(EventCallback callback, void* userdata)
@@ -109,7 +107,6 @@ namespace sf
 			m_oEventFunction = std::bind(&IWindow::OnEvent, this, std::placeholders::_1);
 			m_oUpdateFunction = std::bind<bool>(&IWindow::OnUpdate, this, std::placeholders::_1);
 			m_oRenderFunction = std::bind(&IWindow::OnRender, this, std::placeholders::_1);
-
 		}
 	}
 
@@ -119,7 +116,6 @@ namespace sf
 		m_oSize(size), m_oPosition(position), m_strTitle(title), m_uWindowFlags(windowFlags),
 		m_uRenderFlags(renderFlags), m_pCurrentScreen(nullptr), m_pCurrentException("")
 	{
-		
 	}
 
 	void IWindow::MessageLoop()
@@ -142,7 +138,6 @@ namespace sf
 			{
 				if (m_oEventFunction(m_oEvent))
 				{
-
 					if (m_oEvent.type == SDL_QUIT)
 					{
 						m_atomWindowOpen = false;
diff --git a/src/sdlf/Window.hpp b/src/sdlf/Window.hpp
index feec15f..3b20f01 100644
--- a/src/sdlf/Window.hpp
+++ b/src/sdlf/Window.hpp
@@ -38,9 +38,9 @@ namespace sf
 
 		virtual bool OnCreate() { return true; }
 		virtual void OnClose() { }
-		virtual bool OnEvent(const SDL_Event& event) override { return true; }
-		virtual bool OnUpdate(double frametime) override { return true; }
-		virtual void OnRender(SDL_Renderer* renderer) override { }
+		bool OnEvent(const SDL_Event& event) override { return true; }
+		bool OnUpdate(double frametime) override { return true; }
+		void OnRender(SDL_Renderer* renderer) override { }
 
 	protected:
 		SDL_Window* m_pWindow;