diff --git a/CMakeLists.txt b/CMakeLists.txt
index e7a3d84..3757379 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,7 @@ project ("xna")
 # Include sub-projects.
 include_directories(${PROJECT_INCLUDES_DIR})
 add_subdirectory ("framework")
-add_subdirectory ("samples")
+
+#add_subdirectory ("samples")
 
 
diff --git a/framework/platform-dx/depthstencilstate.cpp b/framework/platform-dx/depthstencilstate.cpp
index 2aa4e6b..0ee93db 100644
--- a/framework/platform-dx/depthstencilstate.cpp
+++ b/framework/platform-dx/depthstencilstate.cpp
@@ -18,8 +18,8 @@ namespace xna {
 		_description.BackFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
 		_description.BackFace.StencilDepthFailOp = D3D11_STENCIL_OP_KEEP;
 
-		_description.StencilReadMask = IntMaxValue;
-		_description.StencilWriteMask = IntMaxValue;
+		_description.StencilReadMask = static_cast<UINT8>(IntMaxValue);
+		_description.StencilWriteMask = static_cast<UINT8>(IntMaxValue);
 		_description.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
 
 		return _description;
diff --git a/framework/platform-dx/sprite.cpp b/framework/platform-dx/sprite.cpp
index 5bae260..26a2461 100644
--- a/framework/platform-dx/sprite.cpp
+++ b/framework/platform-dx/sprite.cpp
@@ -150,27 +150,38 @@ namespace xna {
 			t.M21, t.M22, t.M23, t.M24,
 			t.M31, t.M32, t.M33, t.M34,
 			t.M41, t.M42, t.M43, t.M44);		
+		
+		std::function<void __cdecl()> effectFunc = nullptr;
 
-		if (effect && !impl->dxInputLayout) {
-			void const* shaderByteCode;
-			size_t byteCodeLength;	
+		//if Effect is not null set effectBuffer and inputLayout
+		if (effect && effect->impl) {
+			bool effectBufferChanged = false;
 
-			effect->impl->dxEffect->GetVertexShaderBytecode(&shaderByteCode, &byteCodeLength);
+			if (!impl->effectBuffer || impl->effectBuffer != effect->impl->dxEffect) {
+				impl->effectBuffer = effect->impl->dxEffect;			
+				effectBufferChanged = true;
+			}
 
-			m_device->impl->_device->CreateInputLayout(
-				DirectX::VertexPositionColorTexture::InputElements,
-				DirectX::VertexPositionColorTexture::InputElementCount,
-				shaderByteCode, byteCodeLength,
-				impl->dxInputLayout.GetAddressOf());
-		}		
+			if (effectBufferChanged) {
+				void const* shaderByteCode;
+				size_t byteCodeLength;
 
-		auto& context = m_device->impl->_context;
+				effect->impl->dxEffect->GetVertexShaderBytecode(&shaderByteCode, &byteCodeLength);
 
-		std::function funcEffect = [=] {
-			effect->impl->dxEffect->Apply(context.Get());
-			context->IASetInputLayout(impl->dxInputLayout.Get());
-			};
-		std::function funcVoid = [=] {};
+				m_device->impl->_device->CreateInputLayout(
+					DirectX::VertexPositionColorTexture::InputElements,
+					DirectX::VertexPositionColorTexture::InputElementCount,
+					shaderByteCode, byteCodeLength,
+					impl->dxInputLayout.GetAddressOf());
+			}
+
+			auto& context = m_device->impl->_context;
+
+			effectFunc = [=] {
+				impl->effectBuffer->Apply(context.Get());
+				context->IASetInputLayout(impl->dxInputLayout.Get());
+				};
+		}
 
 		impl->_dxspriteBatch->Begin(
 			sort,
@@ -178,7 +189,7 @@ namespace xna {
 			samplerState ? samplerState->impl->_samplerState.Get() : nullptr,
 			depthStencil ? depthStencil->impl->dxDepthStencil.Get() : nullptr,
 			rasterizerState ? rasterizerState->impl->dxRasterizerState.Get() : nullptr,
-			effect ? funcEffect : funcVoid,
+			effectFunc,
 			matrix
 		);
 	}
diff --git a/inc/xna/xna-dx.hpp b/inc/xna/xna-dx.hpp
index 75944f6..a3bf2f3 100644
--- a/inc/xna/xna-dx.hpp
+++ b/inc/xna/xna-dx.hpp
@@ -1,5 +1,7 @@
-#ifndef XNA_PLATFORMDX_DX_HPP
-#define XNA_PLATFORMDX_DX_HPP
+#ifndef XNA_XNA_DX_HPP
+#define XNA_XNA_DX_HPP
+
+#define NOMINMAX
 
 //---------------- DX INCLUDES ----------------//
 
@@ -12,10 +14,12 @@
 #include "d3d11.h"
 #include <d3d11_1.h>
 #include <d3d11_2.h>
-//HSLS AND EFFECTS
-#include <d3dcompiler.h>
+#include <d3d11_3.h>
+#include <d3d11_4.h>
 #include <d3d11shader.h>
-#include "effects11/d3dx11effect.h"
+#include <d3d11shadertracing.h>
+#include <d3dcommon.h>
+#include <d3dcsx.h>
 //DirectXTK
 #include <DirectXMath.h>
 #include <Audio.h>
@@ -39,7 +43,6 @@
 #include <VertexTypes.h>
 #include <WICTextureLoader.h>
 //Windows
-#define NOMINMAX
 #include <Windows.h>
 #include <windowsx.h>
 #include <Windows.Foundation.h>
@@ -62,7 +65,7 @@ namespace xna {
 
 	struct DxHelpers {
 		static constexpr DirectX::XMVECTOR VectorToDx(Vector2 const& value) {
-			DirectX::XMVECTOR v;
+			DirectX::XMVECTOR v{};
 
 			v.m128_f32[0] = value.X;
 			v.m128_f32[1] = value.Y;
@@ -72,7 +75,7 @@ namespace xna {
 
 
 		static constexpr DirectX::XMVECTOR VectorToDx(Vector3 const& value) {
-			DirectX::XMVECTOR v;
+			DirectX::XMVECTOR v{};
 
 			v.m128_f32[0] = value.X;
 			v.m128_f32[1] = value.Y;
@@ -82,7 +85,7 @@ namespace xna {
 		}
 
 		static constexpr DirectX::XMFLOAT3 Vector3ToDx(Vector3 const& value) {
-			DirectX::XMFLOAT3 v;
+			DirectX::XMFLOAT3 v{};
 
 			v.x = value.X;
 			v.y = value.Y;
@@ -92,7 +95,7 @@ namespace xna {
 		}
 
 		static constexpr DirectX::XMVECTOR VectorToDx(Vector4 const& value) {
-			DirectX::XMVECTOR v;
+			DirectX::XMVECTOR v{};
 
 			v.m128_f32[0] = value.X;
 			v.m128_f32[1] = value.Y;
@@ -554,7 +557,7 @@ namespace xna {
 		uint64_t m_targetElapsedTicks;
 	};
 
-	//---------------- IMPL ----------------//
+	//---------------- IMPLEMENTATIONS ----------------//
 
 	struct SpriteFont::PlatformImplementation {
 		uptr<DirectX::SpriteFont> _dxSpriteFont{ nullptr };
@@ -563,6 +566,7 @@ namespace xna {
 	struct SpriteBatch::PlatformImplementation {
 		sptr<DirectX::SpriteBatch> _dxspriteBatch = nullptr;
 		comptr<ID3D11InputLayout> dxInputLayout = nullptr;
+		sptr<DirectX::DX11::IEffect> effectBuffer = nullptr;
 	};
 
 	struct GraphicsAdapter::PlatformImplementation {
@@ -683,7 +687,7 @@ namespace xna {
 		DXGI_SWAP_CHAIN_DESC1 dxDescription{};
 		DXGI_SWAP_CHAIN_FULLSCREEN_DESC dxFullScreenDescription{};
 
-		bool GetBackBuffer(comptr<ID3D11Texture2D>& texture2D) {
+		bool GetBackBuffer(comptr<ID3D11Texture2D>& texture2D) const {
 			if (!dxSwapChain)
 				return false;
 
@@ -769,7 +773,7 @@ namespace xna {
 			ShowCursor(visible);
 		}
 
-		inline void Close() {
+		inline void Close() const {
 			PostMessage(_windowHandle, WM_DESTROY, 0, 0);
 		}
 
diff --git a/samples/02_PlatfformerStarterKit/headers.hpp b/samples/02_PlatfformerStarterKit/headers.hpp
index 951642e..ca5e858 100644
--- a/samples/02_PlatfformerStarterKit/headers.hpp
+++ b/samples/02_PlatfformerStarterKit/headers.hpp
@@ -1,2 +1 @@
-#include "xna/xna.hpp"
 #include "xna/xna-dx.hpp"
\ No newline at end of file