diff --git a/framework/platform-dx/effect.cpp b/framework/platform-dx/effect.cpp
index a7e6cda..6a5c797 100644
--- a/framework/platform-dx/effect.cpp
+++ b/framework/platform-dx/effect.cpp
@@ -21,7 +21,7 @@ namespace xna {
 			device->impl->_device,
 			//ID3DX11Effect * *ppEffect
 			&impl->dxEffect
-		);				
+		);
 
 		if FAILED(result)
 			throw std::runtime_error("Effect::Effect: Unable to create an effect with memory data.");
@@ -32,7 +32,7 @@ namespace xna {
 		impl->dxEffect->GetDesc(&desc);
 
 		auto tech = impl->dxEffect->GetTechniqueByIndex(0);
-		
+
 		auto technique = snew<EffectTechnique>();
 		technique->impl->dxContext = m_device->impl->_context;
 		technique->impl->dxContext->AddRef();
@@ -50,33 +50,42 @@ namespace xna {
 	Int EffectAnnotation::ColumCount() const {
 		auto type = impl->dxVariable->GetType();
 		D3DX11_EFFECT_TYPE_DESC desc{};
-		type->GetDesc(&desc);
+		const auto hr = type->GetDesc(&desc);
 
 		type->Release();
 		type = nullptr;
 
+		if FAILED(hr)
+			throw std::runtime_error("EffectAnnotation::ColumCount: error getting D3DX11_EFFECT_TYPE_DESC");
+
 		return static_cast<Int>(desc.Columns);
 	}
 
 	String EffectAnnotation::Name() const {
 		auto type = impl->dxVariable->GetType();
 		D3DX11_EFFECT_TYPE_DESC desc{};
-		type->GetDesc(&desc);
+		const auto hr = type->GetDesc(&desc);
 
 		type->Release();
 		type = nullptr;
 
+		if FAILED(hr)
+			throw std::runtime_error("EffectAnnotation::Name: error getting D3DX11_EFFECT_TYPE_DESC");
+
 		return String(desc.TypeName);
 	}
 
 	EffectParameterClass EffectAnnotation::ParameterClass() const {
 		auto type = impl->dxVariable->GetType();
 		D3DX11_EFFECT_TYPE_DESC desc{};
-		type->GetDesc(&desc);
+		const auto hr = type->GetDesc(&desc);
 
 		type->Release();
 		type = nullptr;
 
+		if FAILED(hr)
+			throw std::runtime_error("EffectAnnotation::ParameterClass: error getting D3DX11_EFFECT_TYPE_DESC");
+
 		switch (desc.Class)
 		{
 		case D3D_SHADER_VARIABLE_CLASS::D3D_SVC_MATRIX_COLUMNS:
@@ -91,18 +100,21 @@ namespace xna {
 		case D3D_SHADER_VARIABLE_CLASS::D3D_SVC_VECTOR:
 			return EffectParameterClass::Vector;
 		default:
-			throw std::runtime_error(" EffectAnnotation::ParameterClass: invalid EffectParameterClass.");
+			throw std::runtime_error("EffectAnnotation::ParameterClass: invalid EffectParameterClass.");
 		}
 	}
 
-	Int EffectAnnotation::Rowcount() const {
+	Int EffectAnnotation::RowCount() const {
 		auto type = impl->dxVariable->GetType();
 		D3DX11_EFFECT_TYPE_DESC desc{};
-		type->GetDesc(&desc);
+		const auto hr = type->GetDesc(&desc);
 
 		type->Release();
 		type = nullptr;
 
+		if FAILED(hr)
+			throw std::runtime_error("EffectAnnotation::RowCount: error getting D3DX11_EFFECT_TYPE_DESC");
+
 		return static_cast<Int>(desc.Rows);
 	}
 
@@ -118,31 +130,31 @@ namespace xna {
 
 	bool EffectAnnotation::GetValueBoolean() const {
 		auto scalar = impl->dxVariable->AsScalar();
-		
-		bool value = false;
-		auto hr = scalar->GetBool(&value);
 
-		if FAILED(hr)
-			throw std::runtime_error("EffectAnnotation::GetValueBoolean: Unable to get boolean value.");
+		bool value;
+		auto hr = scalar->GetBool(&value);
 
 		scalar->Release();
 		scalar = nullptr;
 
+		if FAILED(hr)
+			throw std::runtime_error("EffectAnnotation::GetValueBoolean: Unable to get boolean value.");
+
 		return value;
 	}
 
 	Int EffectAnnotation::GetValueInt32() const {
 		auto scalar = impl->dxVariable->AsScalar();
 
-		int value = 0;
+		int value;
 		auto hr = scalar->GetInt(&value);
 
-		if FAILED(hr)
-			throw std::runtime_error("EffectAnnotation::GetValueInt32: Unable to get interger value.");
-
 		scalar->Release();
 		scalar = nullptr;
 
+		if FAILED(hr)
+			throw std::runtime_error("EffectAnnotation::GetValueInt32: Unable to get interger value.");
+
 		return static_cast<Int>(value);
 	}
 
@@ -151,6 +163,8 @@ namespace xna {
 
 		float values[16];
 		auto hr = matrix->GetMatrix(values);
+		matrix->Release();
+		matrix = nullptr;
 
 		if FAILED(hr)
 			throw std::runtime_error("EffectAnnotation::GetValueMatrix: Unable to get matrix value.");
@@ -173,36 +187,36 @@ namespace xna {
 		m.M43 = values[14];
 		m.M44 = values[15];
 
-		matrix->Release();
-		matrix = nullptr;
-
 		return m;
 	}
 
 	float EffectAnnotation::GetValueSingle() const {
 		auto scalar = impl->dxVariable->AsScalar();
 
-		float value = 0;
+		float value;
 		auto hr = scalar->GetFloat(&value);
 
-		if FAILED(hr)
-			throw std::runtime_error("EffectAnnotation::GetValueSingle: Unable to get float value.");
-
 		scalar->Release();
 		scalar = nullptr;
 
+		if FAILED(hr)
+			throw std::runtime_error("EffectAnnotation::GetValueSingle: Unable to get float value.");
+
 		return value;
 	}
 
 	String EffectAnnotation::GetValueString() const {
 		auto str = impl->dxVariable->AsString();
-		
+
 		LPCSTR data;
-		str->GetString(&data);
-		
+		const auto hr = str->GetString(&data);
+
 		str->Release();
 		str = nullptr;
-		
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectAnnotation::GetValueString: Unable to get string value.");
+
 		return String(data);
 	}
 
@@ -212,6 +226,9 @@ namespace xna {
 		float values[2];
 		auto hr = scalar->GetFloatArray(values, 0, 2);
 
+		scalar->Release();
+		scalar = nullptr;
+
 		if FAILED(hr)
 			throw std::runtime_error("EffectAnnotation::GetValueVector2: Unable to get Vector2 value.");
 
@@ -219,18 +236,18 @@ namespace xna {
 		v.X = values[0];
 		v.Y = values[1];
 
-		scalar->Release();
-		scalar = nullptr;
-
 		return v;
 	}
 
-	Vector3 EffectAnnotation::GetValueVector3() const {		
+	Vector3 EffectAnnotation::GetValueVector3() const {
 		auto scalar = impl->dxVariable->AsScalar();
 
 		float values[3];
 		auto hr = scalar->GetFloatArray(values, 0, 3);
 
+		scalar->Release();
+		scalar = nullptr;
+
 		if FAILED(hr)
 			throw std::runtime_error("EffectAnnotation::GetValueVector3: Unable to get Vector3 value.");
 
@@ -239,20 +256,20 @@ namespace xna {
 		v.Y = values[1];
 		v.Z = values[2];
 
-		scalar->Release();
-		scalar = nullptr;
-
 		return v;
 	}
 
-	Vector4 EffectAnnotation::GetValueVector4() const {		
+	Vector4 EffectAnnotation::GetValueVector4() const {
 		auto scalar = impl->dxVariable->AsScalar();
 
 		float values[4];
 		auto hr = scalar->GetFloatArray(values, 0, 4);
 
+		scalar->Release();
+		scalar = nullptr;
+
 		if FAILED(hr)
-			throw std::runtime_error("EffectAnnotation::GetValueVector4: Unable to get Vector4 value.");		
+			throw std::runtime_error("EffectAnnotation::GetValueVector4: Unable to get Vector4 value.");
 
 		Vector4 v;
 		v.X = values[0];
@@ -260,9 +277,6 @@ namespace xna {
 		v.Z = values[2];
 		v.W = values[3];
 
-		scalar->Release();
-		scalar = nullptr;
-
 		return v;
 	}
 
@@ -285,19 +299,22 @@ namespace xna {
 			throw std::runtime_error("EffectPass::Annotations: The class was not initialized correctly");
 
 		D3DX11_PASS_DESC desc{};
-		impl->dxPass->GetDesc(&desc);
+		const auto hr = impl->dxPass->GetDesc(&desc);
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectPass::Annotations: error getting D3DX11_PASS_DESC");
 
 		auto annotCount = desc.Annotations;
 
 		if (annotCount == 0)
 			return snew<EffectAnnotationCollection>();
-		
+
 		std::vector<PEffectAnnotation> list(annotCount);
 
 		for (size_t i = 0; i < annotCount; ++i) {
 			auto current = impl->dxPass->GetAnnotationByIndex(i);
 			auto annotation = snew<EffectAnnotation>();
-			annotation->impl->dxVariable = current;		
+			annotation->impl->dxVariable = current;
 			annotation->impl->dxVariable->AddRef();
 
 			current->Release();
@@ -309,12 +326,15 @@ namespace xna {
 		auto collection = snew<EffectAnnotationCollection>(list);
 		return collection;
 	}
-	
+
 	void EffectPass::Apply() {
 		if (!impl->dxPass)
 			throw std::runtime_error("EffectPass::Apply: The class was not initialized correctly");
 
-		impl->dxPass->Apply(0, impl->dxContext);
+		const auto hr = impl->dxPass->Apply(0, impl->dxContext);
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectPass::Apply: error to call Apply");
 	}
 
 	EffectTechnique::EffectTechnique() {
@@ -323,14 +343,20 @@ namespace xna {
 
 	String EffectTechnique::Name() const {
 		D3DX11_TECHNIQUE_DESC desc;
-		impl->dxTechnique->GetDesc(&desc);
-		
+		const auto hr = impl->dxTechnique->GetDesc(&desc);
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectTechnique::Name: error getting D3DX11_TECHNIQUE_DESC");
+
 		return String(desc.Name);
 	}
 
 	PEffectAnnotationCollection EffectTechnique::Annotations() const {
 		D3DX11_TECHNIQUE_DESC desc;
-		impl->dxTechnique->GetDesc(&desc);
+		const auto hr = impl->dxTechnique->GetDesc(&desc);
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectTechnique::Annotations: error getting D3DX11_TECHNIQUE_DESC");
 
 		auto annotCount = desc.Annotations;
 
@@ -357,7 +383,10 @@ namespace xna {
 
 	PEffectPassCollection EffectTechnique::Passes() const {
 		D3DX11_TECHNIQUE_DESC desc;
-		impl->dxTechnique->GetDesc(&desc);
+		const auto hr = impl->dxTechnique->GetDesc(&desc);
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectTechnique::Passes: error getting D3DX11_TECHNIQUE_DESC");
 
 		auto passCount = desc.Passes;
 
@@ -368,7 +397,7 @@ namespace xna {
 
 		for (size_t i = 0; i < passCount; ++i) {
 			auto current = impl->dxTechnique->GetPassByIndex(i);
-			
+
 			auto pass = snew<EffectPass>();
 			pass->impl->dxPass = current;
 			pass->impl->dxPass->AddRef();
@@ -385,4 +414,368 @@ namespace xna {
 		auto collection = snew<EffectPassCollection>(list);
 		return collection;
 	}
+
+	EffectParameter::EffectParameter() {
+		impl = unew<PlatformImplementation>();
+	}
+
+	PEffectAnnotationCollection EffectParameter::Annotations() const {
+		D3DX11_EFFECT_VARIABLE_DESC desc;
+		const auto hr = impl->dxVariable->GetDesc(&desc);
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::Annotations: error getting D3DX11_EFFECT_VARIABLE_DESC");
+
+		auto annotCount = desc.Annotations;
+
+		if (annotCount == 0)
+			return snew<EffectAnnotationCollection>();
+
+		std::vector<PEffectAnnotation> list(annotCount);
+
+		for (size_t i = 0; i < annotCount; ++i) {
+			auto current = impl->dxVariable->GetAnnotationByIndex(i);
+			auto annotation = snew<EffectAnnotation>();
+			annotation->impl->dxVariable = current;
+			annotation->impl->dxVariable->AddRef();
+
+			current->Release();
+			current = nullptr;
+
+			list[i] = annotation;
+		}
+
+		auto collection = snew<EffectAnnotationCollection>(list);
+		return collection;
+	}
+
+	Int EffectParameter::ColumnCount() const {
+		auto type = impl->dxVariable->GetType();
+		D3DX11_EFFECT_TYPE_DESC desc{};
+		const auto hr = type->GetDesc(&desc);
+
+		type->Release();
+		type = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::ColumnCount: error getting D3DX11_EFFECT_VARIABLE_DESC");
+
+		return static_cast<Int>(desc.Columns);
+	}
+
+	Int EffectParameter::RowCount() const {
+		auto type = impl->dxVariable->GetType();
+		D3DX11_EFFECT_TYPE_DESC desc{};
+		const auto hr = type->GetDesc(&desc);
+
+		type->Release();
+		type = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::RowCount: error getting D3DX11_EFFECT_TYPE_DESC");
+
+		return static_cast<Int>(desc.Rows);
+	}
+
+	String EffectParameter::Semantic() const {
+		auto type = impl->dxVariable->GetType();
+		auto semantic = type->GetMemberSemantic(0);
+
+		type->Release();
+		type = nullptr;
+
+		return std::string(semantic);
+	}
+
+	EffectParameterType EffectParameter::ParameterType() const {
+		auto type = impl->dxVariable->GetType();
+		D3DX11_EFFECT_TYPE_DESC desc{};
+		const auto hr = type->GetDesc(&desc);
+
+		type->Release();
+		type = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::ParameterType: error getting D3DX11_EFFECT_TYPE_DESC");
+
+		switch (desc.Type)
+		{
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_BOOL:
+			return EffectParameterType::Bool;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_INT:
+			return EffectParameterType::Int32;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_FLOAT:
+			return EffectParameterType::Single;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_STRING:
+			return EffectParameterType::String;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_TEXTURE:
+			return EffectParameterType::Texture;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_TEXTURE1D:
+			return EffectParameterType::Texture1D;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_TEXTURE2D:
+			return EffectParameterType::Texture2D;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_TEXTURE3D:
+			return EffectParameterType::Texture3D;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_TEXTURECUBE:
+			return EffectParameterType::TextureCube;
+		case D3D_SHADER_VARIABLE_TYPE::D3D_SVT_VOID:
+			return EffectParameterType::Void;
+		default:
+			throw std::runtime_error("EffectParameter::ParameterType: invalid EffectParameterType.");
+		}
+	}
+
+	EffectParameterClass EffectParameter::ParameterClass() const {
+		auto type = impl->dxVariable->GetType();
+		D3DX11_EFFECT_TYPE_DESC desc{};
+		const auto hr = type->GetDesc(&desc);
+
+		type->Release();
+		type = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::ParameterClass: error getting D3DX11_EFFECT_TYPE_DESC");
+
+		switch (desc.Class)
+		{
+		case D3D_SHADER_VARIABLE_CLASS::D3D_SVC_MATRIX_COLUMNS:
+		case D3D_SHADER_VARIABLE_CLASS::D3D_SVC_MATRIX_ROWS:
+			return EffectParameterClass::Matrix;
+		case D3D_SHADER_VARIABLE_CLASS::D3D_SVC_OBJECT:
+			return EffectParameterClass::Object;
+		case D3D_SHADER_VARIABLE_CLASS::D3D_SVC_SCALAR:
+			return EffectParameterClass::Scalar;
+		case D3D_SHADER_VARIABLE_CLASS::D3D_SVC_STRUCT:
+			return EffectParameterClass::Struct;
+		case D3D_SHADER_VARIABLE_CLASS::D3D_SVC_VECTOR:
+			return EffectParameterClass::Vector;
+		default:
+			throw std::runtime_error("EffectParameter::ParameterClass: invalid EffectParameterClass.");
+		}
+	}
+
+	String EffectParameter::Name() const {
+		auto type = impl->dxVariable->GetType();
+		D3DX11_EFFECT_TYPE_DESC desc{};
+		const auto hr = type->GetDesc(&desc);
+
+		type->Release();
+		type = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::Name: error getting D3DX11_EFFECT_TYPE_DESC");
+
+		return String(desc.TypeName);
+	}
+
+	sptr<EffectParameterCollection> EffectParameter::Elements() const {
+		uint32_t index = 0;
+
+		auto collection = snew<EffectParameterCollection>();
+
+		while (true) {
+			auto el = impl->dxVariable->GetElement(index);
+
+			if (!el)
+				break;
+
+			auto efparam = snew<EffectParameter>();
+			efparam->impl->dxVariable = el;
+			efparam->impl->dxVariable->AddRef();
+
+			el->Release();
+			el = nullptr;
+		}
+
+
+		return collection;
+	}
+
+	sptr<EffectParameterCollection> EffectParameter::StructureMembers() const {
+		uint32_t index = 0;
+
+		auto collection = snew<EffectParameterCollection>();
+
+		while (true) {
+			auto member = impl->dxVariable->GetMemberByIndex(index);
+
+			if (!member)
+				break;
+
+			auto efparam = snew<EffectParameter>();
+			efparam->impl->dxVariable = member;
+			efparam->impl->dxVariable->AddRef();
+
+			member->Release();
+			member = nullptr;
+		}
+
+
+		return collection;
+	}
+
+	bool EffectParameter::GetValueBoolean() const {
+		auto scalar = impl->dxVariable->AsScalar();
+
+		bool value;
+		const auto hr = scalar->GetBool(&value);
+		scalar->Release();
+		scalar = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::GetValueBoolean: Unable to get boolean value.");
+
+		return value;
+	}
+
+	std::vector<bool> EffectParameter::GetValueBooleanArray(size_t count) const {
+		auto scalar = impl->dxVariable->AsScalar();
+		auto arr = std::make_unique<bool[]>(count);
+
+		const auto hr = scalar->GetBoolArray(arr.get(), 0, count);
+		scalar->Release();
+		scalar = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::GetValueBooleanArray: Unable to get boolean value.");
+
+		std::vector<bool> data(count);
+
+		for (size_t i = 0; i < count; ++i) {
+			data[i] = arr[i];
+		}
+
+		return data;
+	}
+
+	Int EffectParameter::GetValueInt32() const {
+		auto scalar = impl->dxVariable->AsScalar();
+
+		Int value;
+		const auto hr = scalar->GetInt(&value);
+		scalar->Release();
+		scalar = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::GetValueInt32: Unable to get int value.");
+
+		return value;
+	}
+
+	std::vector<Int> EffectParameter::GetValueInt32Array(size_t count) const {
+		auto scalar = impl->dxVariable->AsScalar();
+		std::vector<Int> data(count);
+
+		const auto hr = scalar->GetIntArray(data.data(), 0, count);
+		scalar->Release();
+		scalar = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::GetValueInt32Array: Unable to get int value.");
+
+		return data;
+	}
+
+	Matrix EffectParameter::GetValueMatrix() const {
+		auto matrix = impl->dxVariable->AsMatrix();
+		float values[16];
+		auto hr = matrix->GetMatrix(values);
+		matrix->Release();
+		matrix = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::GetValueIntMatrix: Unable to get matrix value.");
+
+		Matrix m;
+		m.M11 = values[0];
+		m.M12 = values[1];
+		m.M13 = values[2];
+		m.M14 = values[3];
+		m.M21 = values[4];
+		m.M22 = values[5];
+		m.M23 = values[6];
+		m.M24 = values[7];
+		m.M31 = values[8];
+		m.M32 = values[9];
+		m.M33 = values[10];
+		m.M34 = values[11];
+		m.M41 = values[12];
+		m.M42 = values[13];
+		m.M43 = values[14];
+		m.M44 = values[15];
+
+		return m;
+	}
+
+	std::vector<Matrix> EffectParameter::GetValueMatrixArray(size_t count) const {
+		auto matrix = impl->dxVariable->AsMatrix();
+		const auto elements = count * 16;
+		auto arr = std::make_unique<float[]>(count * elements);
+
+		auto hr = matrix->GetMatrixArray(arr.get(), 0, elements);
+		matrix->Release();
+		matrix = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::GetValuetMatrixArray: Unable to get matrix value.");
+
+		auto index = 0;
+		std::vector<Matrix> data(count);
+
+		for (size_t i = 0; i < elements; ++i) {
+			Matrix m;
+			m.M11 = arr[i];
+			m.M12 = arr[++i];
+			m.M13 = arr[++i];
+			m.M14 = arr[++i];
+			m.M21 = arr[++i];
+			m.M22 = arr[++i];
+			m.M23 = arr[++i];
+			m.M24 = arr[++i];
+			m.M31 = arr[++i];
+			m.M32 = arr[++i];
+			m.M33 = arr[++i];
+			m.M34 = arr[++i];
+			m.M41 = arr[++i];
+			m.M42 = arr[++i];
+			m.M43 = arr[++i];
+			m.M44 = arr[++i];
+
+			data[index] = m;
+			++index;
+		}
+
+		return data;
+	}
+
+	Matrix EffectParameter::GetValueMatrixTranspose() const {
+		auto matrix = impl->dxVariable->AsMatrix();
+		float values[16];
+		auto hr = matrix->GetMatrixTranspose(values);
+		matrix->Release();
+		matrix = nullptr;
+
+		if FAILED(hr)
+			throw std::runtime_error("EffectParameter::GetValueIntMatrix: Unable to get matrix value.");
+
+		Matrix m;
+		m.M11 = values[0];
+		m.M12 = values[1];
+		m.M13 = values[2];
+		m.M14 = values[3];
+		m.M21 = values[4];
+		m.M22 = values[5];
+		m.M23 = values[6];
+		m.M24 = values[7];
+		m.M31 = values[8];
+		m.M32 = values[9];
+		m.M33 = values[10];
+		m.M34 = values[11];
+		m.M41 = values[12];
+		m.M42 = values[13];
+		m.M43 = values[14];
+		m.M44 = values[15];
+
+		return m;
+	}
 }
\ No newline at end of file
diff --git a/inc/xna/forward.hpp b/inc/xna/forward.hpp
index 5247bd2..2313c0e 100644
--- a/inc/xna/forward.hpp
+++ b/inc/xna/forward.hpp
@@ -70,6 +70,8 @@ namespace xna {
 	class SwapChain;
 	class Texture;
 	class Texture2D;
+	class Texture3D;
+	class TextureCube;
 	class RasterizerState;
 	class SamplerState;
 	class Shader;
diff --git a/inc/xna/graphics/effect.hpp b/inc/xna/graphics/effect.hpp
index 1f46571..9cc4f30 100644
--- a/inc/xna/graphics/effect.hpp
+++ b/inc/xna/graphics/effect.hpp
@@ -5,189 +5,296 @@
 #include "../default.hpp"
 #include "gresource.hpp"
 
-namespace xna {   
-    //Represents an annotation to an EffectParameter. 
-    class EffectAnnotation {
-    public:        
-        Int ColumCount() const;
-        String Name() const;
-        EffectParameterClass ParameterClass() const;
-        Int Rowcount() const;
-        String Semantic() const;
-        bool GetValueBoolean() const;
-        Int GetValueInt32() const;
-        Matrix GetValueMatrix() const;
-        float GetValueSingle() const;
-        String GetValueString() const;
-        Vector2 GetValueVector2() const;
-        Vector3 GetValueVector3() const;
-        Vector4 GetValueVector4() const;
+namespace xna {
+	//Represents an annotation to an EffectParameter. 
+	class EffectAnnotation {
+	public:
+		Int ColumCount() const;
+		String Name() const;
+		EffectParameterClass ParameterClass() const;
+		Int RowCount() const;
+		String Semantic() const;
+		bool GetValueBoolean() const;
+		Int GetValueInt32() const;
+		Matrix GetValueMatrix() const;
+		float GetValueSingle() const;
+		String GetValueString() const;
+		Vector2 GetValueVector2() const;
+		Vector3 GetValueVector3() const;
+		Vector4 GetValueVector4() const;
 
-    public:
-        struct PlatformImplementation;
-        uptr<PlatformImplementation> impl;
+	public:
+		struct PlatformImplementation;
+		uptr<PlatformImplementation> impl;
 
-    public:
-        EffectAnnotation();
-    };
+	public:
+		EffectAnnotation();
+	};
+	using PEffectAnnotation = sptr<EffectAnnotation>;
 
-    using PEffectAnnotation = sptr<EffectAnnotation>;
+	class EffectAnnotationCollection {
+	public:
+		EffectAnnotationCollection() {}
 
-    class EffectAnnotationCollection {
-    public:
-        EffectAnnotationCollection(){}
-        
-        EffectAnnotationCollection(std::vector<PEffectAnnotation> const& data) : data(data)
-        {
-        }
+		EffectAnnotationCollection(std::vector<PEffectAnnotation> const& data) : data(data)
+		{
+		}
 
-        constexpr size_t Count() const {
-            return data.size();
-        }
+		constexpr size_t Count() const {
+			return data.size();
+		}
 
-        PEffectAnnotation operator[](size_t index) {
-            if (index >= data.size())
-                return nullptr;
+		PEffectAnnotation operator[](size_t index) {
+			if (index >= data.size())
+				return nullptr;
 
-            return data[index];
-        }
+			return data[index];
+		}
 
-        PEffectAnnotation operator[](String const& name) {
-            for (size_t i = 0; i < data.size(); ++i) {
-                const auto& p = data[i];
+		PEffectAnnotation operator[](String const& name) {
+			for (size_t i = 0; i < data.size(); ++i) {
+				const auto& p = data[i];
 
-                if (p->Name() == name)
-                    return p;
-            }
+				if (p->Name() == name)
+					return p;
+			}
 
-            return nullptr;
-        }
+			return nullptr;
+		}
 
-    public:
-        std::vector<PEffectAnnotation> data;
-    };
+	public:
+		std::vector<PEffectAnnotation> data;
+	};
+	using PEffectAnnotationCollection = sptr<EffectAnnotationCollection>;
 
-    using PEffectAnnotationCollection = sptr<EffectAnnotationCollection>;
+	class EffectPass {
+	public:
+		//Gets the name of this pass. 
+		String Name() const;
+		//The EffectAnnotationCollection containing EffectAnnotation objects for this EffectPass.
+		PEffectAnnotationCollection Annotations() const;
 
-    class EffectPass {
-    public:        
-        //Gets the name of this pass. 
-        String Name() const;
-        //The EffectAnnotationCollection containing EffectAnnotation objects for this EffectPass.
-        PEffectAnnotationCollection Annotations() const;
+		//Begins this pass.
+		void Apply();
+	public:
+		struct PlatformImplementation;
+		uptr<PlatformImplementation> impl;
 
-        //Begins this pass.
-        void Apply();
-    public:
-        struct PlatformImplementation;
-        uptr<PlatformImplementation> impl;    
+	public:
+		EffectPass();
+	};
+	using PEffectPass = sptr<EffectPass>;
 
-    public:
-        EffectPass();
-    };
+	class EffectPassCollection {
+	public:
+		EffectPassCollection() {}
 
-    using PEffectPass = sptr<EffectPass>;
+		EffectPassCollection(std::vector<PEffectPass> const& data) : data(data)
+		{
+		}
 
-    class EffectPassCollection {
-    public:
-        EffectPassCollection(){}
+		constexpr size_t Count() const {
+			return data.size();
+		}
 
-        EffectPassCollection(std::vector<PEffectPass> const& data) : data(data)
-        {
-        }
+		PEffectPass operator[](size_t index) {
+			if (index >= data.size())
+				return nullptr;
 
-        constexpr size_t Count() const {
-            return data.size();
-        }
+			return data[index];
+		}
 
-        PEffectPass operator[](size_t index) {
-            if (index >= data.size())
-                return nullptr;
+		PEffectPass operator[](String const& name) {
+			for (size_t i = 0; i < data.size(); ++i) {
+				const auto& p = data[i];
 
-            return data[index];
-        }
+				if (p->Name() == name)
+					return p;
+			}
 
-        PEffectPass operator[](String const& name) {
-            for (size_t i = 0; i < data.size(); ++i) {
-                const auto& p = data[i];
+			return nullptr;
+		}
 
-                if (p->Name() == name)
-                    return p;
-            }
+	public:
+		std::vector<PEffectPass> data;
+	};
+	using PEffectPassCollection = sptr<EffectPassCollection>;
 
-            return nullptr;
-        }
+	class EffectTechnique {
+	public:
+		PEffectAnnotationCollection Annotations() const;
+		String Name() const;
+		PEffectPassCollection Passes() const;
 
-    public:
-        std::vector<PEffectPass> data;
-    };
+	public:
+		struct PlatformImplementation;
+		uptr<PlatformImplementation> impl;
 
-    using PEffectPassCollection = sptr<EffectPassCollection>;
+	public:
+		EffectTechnique();
+	};
+	using PEffectTechnique = sptr<EffectTechnique>;
 
-    class EffectTechnique {
-    public:
-        PEffectAnnotationCollection Annotations() const;
-        String Name() const;
-        PEffectPassCollection Passes() const;
+	class EffectParameterCollection;
 
-    public:
-        struct PlatformImplementation;
-        uptr<PlatformImplementation> impl;
+	class EffectParameter {
+	public:
+		//Gets the collection of EffectAnnotation objects for this parameter.
+		PEffectAnnotationCollection Annotations() const;
+		//Gets the number of columns in the parameter description.
+		Int ColumnCount() const;
+		//Gets the number of rows in the parameter description.
+		Int RowCount() const;
+		//Gets the semantic meaning, or usage, of the parameter.
+		String Semantic() const;
+		//Gets the type of the parameter.
+		EffectParameterType ParameterType() const;
+		//Gets the class of the parameter.
+		EffectParameterClass ParameterClass() const;
+		//Gets the name of the parameter.
+		String Name() const;
+		//Gets the collection of effect parameters.
+		sptr<EffectParameterCollection> Elements() const;
+		//Gets the collection of structure members.
+		sptr<EffectParameterCollection> StructureMembers() const;
 
-    public:
-        EffectTechnique();
-    };
+		bool GetValueBoolean() const;
+		std::vector<bool> GetValueBooleanArray(size_t count) const;
+		Int GetValueInt32() const;
+		std::vector <Int> GetValueInt32Array(size_t count) const;
+		Matrix GetValueMatrix() const;
+		std::vector <Matrix> GetValueMatrixArray(size_t count) const;
+		Matrix GetValueMatrixTranspose() const;
+		std::vector <Matrix> GetValueMatrixTransposeArray(size_t count) const;
+		Quaternion GetValueQuaternion() const;
+		std::vector <Quaternion> GetValueQuaternionArray() const;
+		float GetValueSingle() const;
+		std::vector<float> GetValueSingleArray() const;
+		String GetValueString() const;
+		sptr<Texture2D> GetValueTexture2D() const;
+		sptr<Texture3D> GetValueTexture3D() const;
+		sptr<TextureCube> GetValueTextureCube() const;
+		Vector2 GetValueVector2() const;
+		std::vector <Vector2> GetValueVector2Array() const;
+		Vector3 GetValueVector3() const;
+		std::vector <Vector3> GetValueVector3Array() const;
+		Vector4 GetValueVector4() const;
+		std::vector <Vector4> GetValueVector4Array() const;
 
-    using PEffectTechnique = sptr<EffectTechnique>;
+		void SetValue(bool value);
+		void SetValue(std::vector<bool> const& value);
+		void SetValue(Int value);
+		void SetValue(std::vector<Int> const& value);
+		void SetValue(float value);
+		void SetValue(std::vector<float> const& value);
+		void SetValue(Matrix const& value);
+		void SetValue(std::vector<Matrix> const& value);
+		void SetValue(Quaternion const& value);
+		void SetValue(std::vector<Quaternion> const& value);
+		void SetValue(Vector2 const& value);
+		void SetValue(std::vector<Vector2> const& value);
+		void SetValue(Vector3 const& value);
+		void SetValue(std::vector<Vector3> const& value);
+		void SetValue(Vector4 const& value);
+		void SetValue(std::vector<Vector4> const& value);
+		void SetValue(String const& value);
+		void SetValue(sptr<Texture> const& value);
 
-    class Effect : public GraphicsResource {
-        Effect(sptr<GraphicsDevice> const& device, std::vector<Byte> const& effectCode);
+		void SetValueTranspose(Matrix const& value);
+		void SetValueTranspose(std::vector<Matrix> const& value);
 
-        PEffectTechnique CurrentTechnique() const;
+	public:
+		struct PlatformImplementation;
+		uptr<PlatformImplementation> impl;
 
-    public:
-        struct PlatformImplementation;
-        uptr<PlatformImplementation> impl;
-    };
+	public:
+		EffectParameter();
+	};
+	using PEffectParameter = sptr<EffectParameter>;
 
-    class IEffectMatrices {
-        virtual Matrix World() const = 0;
-        virtual Matrix View() const = 0;
-        virtual Matrix Projection() const = 0;
+	class EffectParameterCollection {
+	public:
+		EffectParameterCollection() {}
 
-        virtual void World(Matrix const& value) = 0;
-        virtual void View(Matrix const& value) = 0;
-        virtual void Projection(Matrix const& value) = 0;
-    };
+		EffectParameterCollection(std::vector<PEffectParameter> const& data) : data(data)
+		{
+		}
 
-    class DirectionalLight;
+		constexpr size_t Count() const {
+			return data.size();
+		}
 
-    class IEffectLights {
-        virtual DirectionalLight DirectionalLight0() const = 0;
-        virtual DirectionalLight DirectionalLight1() const = 0;
-        virtual DirectionalLight DirectionalLight2() const = 0;
+		PEffectParameter operator[](size_t index) {
+			if (index >= data.size())
+				return nullptr;
 
-        virtual Vector3 AmbientLightColor() const = 0;
-        virtual void AmbientLightColor(Vector3 const& value) = 0;
+			return data[index];
+		}
 
-        virtual bool LightingEnabled() const = 0;
-        virtual void LightingEnabled(bool value) = 0;
+		PEffectParameter operator[](String const& name) {
+			for (size_t i = 0; i < data.size(); ++i) {
+				const auto& p = data[i];
 
-        virtual void EnableDefaultLighting() = 0;
-    };
+				if (p->Name() == name)
+					return p;
+			}
 
-    class IEffectFog
-    {
-        virtual bool FogEnabled() const = 0;
-        virtual float FogStart() const = 0;
-        virtual float FogEnd() const = 0;
-        virtual Vector3 FogColor() const = 0;
+			return nullptr;
+		}
 
-        virtual void FogEnabled(bool value) const = 0;
-        virtual void FogStart(float value) const = 0;
-        virtual void FogEnd(float value) const = 0;
-        virtual void FogColor(Vector3 const& value) const = 0;
-    };
+	public:
+		std::vector<PEffectParameter> data;
+	};
+	using PEffectPassCollection = sptr<EffectPassCollection>;
+
+	class Effect : public GraphicsResource {
+		Effect(sptr<GraphicsDevice> const& device, std::vector<Byte> const& effectCode);
+
+		PEffectTechnique CurrentTechnique() const;
+
+	public:
+		struct PlatformImplementation;
+		uptr<PlatformImplementation> impl;
+	};
+
+	class IEffectMatrices {
+		virtual Matrix World() const = 0;
+		virtual Matrix View() const = 0;
+		virtual Matrix Projection() const = 0;
+
+		virtual void World(Matrix const& value) = 0;
+		virtual void View(Matrix const& value) = 0;
+		virtual void Projection(Matrix const& value) = 0;
+	};
+
+	class DirectionalLight;
+
+	class IEffectLights {
+		virtual DirectionalLight DirectionalLight0() const = 0;
+		virtual DirectionalLight DirectionalLight1() const = 0;
+		virtual DirectionalLight DirectionalLight2() const = 0;
+
+		virtual Vector3 AmbientLightColor() const = 0;
+		virtual void AmbientLightColor(Vector3 const& value) = 0;
+
+		virtual bool LightingEnabled() const = 0;
+		virtual void LightingEnabled(bool value) = 0;
+
+		virtual void EnableDefaultLighting() = 0;
+	};
+
+	class IEffectFog
+	{
+		virtual bool FogEnabled() const = 0;
+		virtual float FogStart() const = 0;
+		virtual float FogEnd() const = 0;
+		virtual Vector3 FogColor() const = 0;
+
+		virtual void FogEnabled(bool value) const = 0;
+		virtual void FogStart(float value) const = 0;
+		virtual void FogEnd(float value) const = 0;
+		virtual void FogColor(Vector3 const& value) const = 0;
+	};
 }
 
 #endif
\ No newline at end of file
diff --git a/inc/xna/platform-dx/dx.hpp b/inc/xna/platform-dx/dx.hpp
index 33e303e..871ff04 100644
--- a/inc/xna/platform-dx/dx.hpp
+++ b/inc/xna/platform-dx/dx.hpp
@@ -963,6 +963,11 @@ namespace xna {
 				dxPass->Release();
 				dxPass = nullptr;
 			}
+			
+			if (dxContext) {
+				dxContext->Release();
+				dxContext = nullptr;
+			}
 		}
 
 		ID3DX11EffectPass* dxPass = nullptr;
@@ -975,12 +980,35 @@ namespace xna {
 				dxTechnique->Release();
 				dxTechnique = nullptr;
 			}
+
+			if (dxContext) {
+				dxContext->Release();
+				dxContext = nullptr;
+			}
 		}
 
 		ID3DX11EffectTechnique* dxTechnique = nullptr;
 		ID3D11DeviceContext* dxContext = nullptr;
 	};
 
+	struct EffectParameter::PlatformImplementation {
+		PlatformImplementation(){}
+
+		PlatformImplementation(ID3DX11EffectVariable* value) {
+			dxVariable = value;
+			dxVariable->AddRef();
+		}
+
+		~PlatformImplementation() {
+			if (dxVariable) {
+				dxVariable->Release();
+				dxVariable = nullptr;
+			}
+		}
+
+		ID3DX11EffectVariable* dxVariable = nullptr;
+	};
+
 	template <typename T>
 	inline bool IndexBuffer::Initialize(std::vector<T> const& data, xna_error_ptr_arg) {
 		if (!impl || !m_device || !m_device->impl->_device || data.empty()) {