diff --git a/Directory.Build.props b/Directory.Build.props
index d9998fd..d43fcc3 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -14,7 +14,7 @@
     <EnableTrimAnalyzer>true</EnableTrimAnalyzer>
     <RestoreConfigFile>$(MSBuildThisFileDirectory)NuGet.config</RestoreConfigFile>
 
-    <VersionPrefix>1.9.6</VersionPrefix>
+    <VersionPrefix>1.9.7</VersionPrefix>
     <VersionSuffix Condition="'$(VersionSuffix)' == ''"></VersionSuffix>
     
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/src/Generator/Program.cs b/src/Generator/Program.cs
index 255d105..7916050 100644
--- a/src/Generator/Program.cs
+++ b/src/Generator/Program.cs
@@ -2409,11 +2409,6 @@ public static class Program
 
                     foreach (ApiParameter parameter in method.Params)
                     {
-                        if (method.Name == "CreateRenderTargetView" && comType.Name == "ID3D12Device")
-                        {
-
-                        }
-
                         GetParameterSignature(api, writer, parameter,
                             $"{comType.Name}::{method.Name}",
                             out string parameterType,
@@ -2434,6 +2429,36 @@ public static class Program
                         {
                             argumentBuilder.Append(" = null");
                         }
+                        else if (method.Name.EndsWith("SetShader") && comType.Name.StartsWith("ID3D11DeviceContext"))
+                        {
+                            if (parameterName.EndsWith("Shader"))
+                            {
+                                argumentBuilder.Append(" = null");
+                            }
+                            else if (parameterName == "ppClassInstances")
+                            {
+                                argumentBuilder.Append(" = null");
+                            }
+                            else if (parameterName == "NumClassInstances")
+                            {
+                                argumentBuilder.Append(" = 0");
+                            }
+                        }
+                        else if (method.Name == "OMSetBlendState" && comType.Name.StartsWith("ID3D11DeviceContext"))
+                        {
+                            if (parameterName == "pBlendState")
+                            {
+                                argumentBuilder.Append(" = default");
+                            }
+                            else if (parameterName == "BlendFactor")
+                            {
+                                argumentBuilder.Append(" = null");
+                            }
+                            else if (parameterName == "SampleMask")
+                            {
+                                argumentBuilder.Append(" = 0xffffffff");
+                            }
+                        }
 
                         argumentsTypesBuilder.Append(parameterType);
                         argumentsNameBuilder.Append(parameterName);
diff --git a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext.cs b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext.cs
index ce8ffa2..6857bec 100644
--- a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext.cs
+++ b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext.cs
@@ -125,7 +125,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 	/// <include file='../Direct3D11.xml' path='doc/member[@name="ID3D11DeviceContext::PSSetShader"]/*' />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(9)]
-	public void PSSetShader(ID3D11PixelShader* pPixelShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void PSSetShader(ID3D11PixelShader* pPixelShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext*, ID3D11PixelShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[9]))((ID3D11DeviceContext*)Unsafe.AsPointer(ref this), pPixelShader, ppClassInstances, NumClassInstances);
 	}
@@ -141,7 +141,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 	/// <include file='../Direct3D11.xml' path='doc/member[@name="ID3D11DeviceContext::VSSetShader"]/*' />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(11)]
-	public void VSSetShader(ID3D11VertexShader* pVertexShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void VSSetShader(ID3D11VertexShader* pVertexShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext*, ID3D11VertexShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[11]))((ID3D11DeviceContext*)Unsafe.AsPointer(ref this), pVertexShader, ppClassInstances, NumClassInstances);
 	}
@@ -237,7 +237,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 	/// <include file='../Direct3D11.xml' path='doc/member[@name="ID3D11DeviceContext::GSSetShader"]/*' />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(23)]
-	public void GSSetShader(ID3D11GeometryShader* pShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void GSSetShader(ID3D11GeometryShader* pShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext*, ID3D11GeometryShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[23]))((ID3D11DeviceContext*)Unsafe.AsPointer(ref this), pShader, ppClassInstances, NumClassInstances);
 	}
@@ -333,7 +333,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 	/// <include file='../Direct3D11.xml' path='doc/member[@name="ID3D11DeviceContext::OMSetBlendState"]/*' />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(35)]
-	public void OMSetBlendState(ID3D11BlendState* pBlendState, float* BlendFactor, uint SampleMask)
+	public void OMSetBlendState(ID3D11BlendState* pBlendState = default, float* BlendFactor = null, uint SampleMask = 0xffffffff)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext*, ID3D11BlendState*, float*, uint, void>)(lpVtbl[35]))((ID3D11DeviceContext*)Unsafe.AsPointer(ref this), pBlendState, BlendFactor, SampleMask);
 	}
@@ -533,7 +533,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 	/// <include file='../Direct3D11.xml' path='doc/member[@name="ID3D11DeviceContext::HSSetShader"]/*' />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(60)]
-	public void HSSetShader(ID3D11HullShader* pHullShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void HSSetShader(ID3D11HullShader* pHullShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext*, ID3D11HullShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[60]))((ID3D11DeviceContext*)Unsafe.AsPointer(ref this), pHullShader, ppClassInstances, NumClassInstances);
 	}
@@ -565,7 +565,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 	/// <include file='../Direct3D11.xml' path='doc/member[@name="ID3D11DeviceContext::DSSetShader"]/*' />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(64)]
-	public void DSSetShader(ID3D11DomainShader* pDomainShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void DSSetShader(ID3D11DomainShader* pDomainShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext*, ID3D11DomainShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[64]))((ID3D11DeviceContext*)Unsafe.AsPointer(ref this), pDomainShader, ppClassInstances, NumClassInstances);
 	}
@@ -605,7 +605,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 	/// <include file='../Direct3D11.xml' path='doc/member[@name="ID3D11DeviceContext::CSSetShader"]/*' />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(69)]
-	public void CSSetShader(ID3D11ComputeShader* pComputeShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void CSSetShader(ID3D11ComputeShader* pComputeShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext*, ID3D11ComputeShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[69]))((ID3D11DeviceContext*)Unsafe.AsPointer(ref this), pComputeShader, ppClassInstances, NumClassInstances);
 	}
@@ -979,13 +979,13 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 		void PSSetShaderResources(uint StartSlot, uint NumViews, ID3D11ShaderResourceView** ppShaderResourceViews);
 
 		[VtblIndex(9)]
-		void PSSetShader(ID3D11PixelShader* pPixelShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances);
+		void PSSetShader(ID3D11PixelShader* pPixelShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0);
 
 		[VtblIndex(10)]
 		void PSSetSamplers(uint StartSlot, uint NumSamplers, ID3D11SamplerState** ppSamplers);
 
 		[VtblIndex(11)]
-		void VSSetShader(ID3D11VertexShader* pVertexShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances);
+		void VSSetShader(ID3D11VertexShader* pVertexShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0);
 
 		[VtblIndex(12)]
 		void DrawIndexed(uint IndexCount, uint StartIndexLocation, int BaseVertexLocation);
@@ -1021,7 +1021,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 		void GSSetConstantBuffers(uint StartSlot, uint NumBuffers, ID3D11Buffer** ppConstantBuffers);
 
 		[VtblIndex(23)]
-		void GSSetShader(ID3D11GeometryShader* pShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances);
+		void GSSetShader(ID3D11GeometryShader* pShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0);
 
 		[VtblIndex(24)]
 		void IASetPrimitiveTopology(Graphics.Direct3D.PrimitiveTopology Topology);
@@ -1057,7 +1057,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 		void OMSetRenderTargetsAndUnorderedAccessViews(uint NumRTVs, ID3D11RenderTargetView** ppRenderTargetViews, ID3D11DepthStencilView* pDepthStencilView, uint UAVStartSlot, uint NumUAVs, ID3D11UnorderedAccessView** ppUnorderedAccessViews, uint* pUAVInitialCounts);
 
 		[VtblIndex(35)]
-		void OMSetBlendState(ID3D11BlendState* pBlendState, float* BlendFactor, uint SampleMask);
+		void OMSetBlendState(ID3D11BlendState* pBlendState = default, float* BlendFactor = null, uint SampleMask = 0xffffffff);
 
 		[VtblIndex(36)]
 		void OMSetDepthStencilState(ID3D11DepthStencilState* pDepthStencilState, uint StencilRef);
@@ -1132,7 +1132,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 		void HSSetShaderResources(uint StartSlot, uint NumViews, ID3D11ShaderResourceView** ppShaderResourceViews);
 
 		[VtblIndex(60)]
-		void HSSetShader(ID3D11HullShader* pHullShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances);
+		void HSSetShader(ID3D11HullShader* pHullShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0);
 
 		[VtblIndex(61)]
 		void HSSetSamplers(uint StartSlot, uint NumSamplers, ID3D11SamplerState** ppSamplers);
@@ -1144,7 +1144,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 		void DSSetShaderResources(uint StartSlot, uint NumViews, ID3D11ShaderResourceView** ppShaderResourceViews);
 
 		[VtblIndex(64)]
-		void DSSetShader(ID3D11DomainShader* pDomainShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances);
+		void DSSetShader(ID3D11DomainShader* pDomainShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0);
 
 		[VtblIndex(65)]
 		void DSSetSamplers(uint StartSlot, uint NumSamplers, ID3D11SamplerState** ppSamplers);
@@ -1159,7 +1159,7 @@ public unsafe partial struct ID3D11DeviceContext : ID3D11DeviceContext.Interface
 		void CSSetUnorderedAccessViews(uint StartSlot, uint NumUAVs, ID3D11UnorderedAccessView** ppUnorderedAccessViews, uint* pUAVInitialCounts);
 
 		[VtblIndex(69)]
-		void CSSetShader(ID3D11ComputeShader* pComputeShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances);
+		void CSSetShader(ID3D11ComputeShader* pComputeShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0);
 
 		[VtblIndex(70)]
 		void CSSetSamplers(uint StartSlot, uint NumSamplers, ID3D11SamplerState** ppSamplers);
diff --git a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext1.cs b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext1.cs
index 4f4c30b..e0a4fb9 100644
--- a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext1.cs
+++ b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext1.cs
@@ -125,7 +125,7 @@ public unsafe partial struct ID3D11DeviceContext1 : ID3D11DeviceContext1.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.PSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(9)]
-	public void PSSetShader(ID3D11PixelShader* pPixelShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void PSSetShader(ID3D11PixelShader* pPixelShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext1*, ID3D11PixelShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[9]))((ID3D11DeviceContext1*)Unsafe.AsPointer(ref this), pPixelShader, ppClassInstances, NumClassInstances);
 	}
@@ -141,7 +141,7 @@ public unsafe partial struct ID3D11DeviceContext1 : ID3D11DeviceContext1.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.VSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(11)]
-	public void VSSetShader(ID3D11VertexShader* pVertexShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void VSSetShader(ID3D11VertexShader* pVertexShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext1*, ID3D11VertexShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[11]))((ID3D11DeviceContext1*)Unsafe.AsPointer(ref this), pVertexShader, ppClassInstances, NumClassInstances);
 	}
@@ -237,7 +237,7 @@ public unsafe partial struct ID3D11DeviceContext1 : ID3D11DeviceContext1.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.GSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(23)]
-	public void GSSetShader(ID3D11GeometryShader* pShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void GSSetShader(ID3D11GeometryShader* pShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext1*, ID3D11GeometryShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[23]))((ID3D11DeviceContext1*)Unsafe.AsPointer(ref this), pShader, ppClassInstances, NumClassInstances);
 	}
@@ -333,7 +333,7 @@ public unsafe partial struct ID3D11DeviceContext1 : ID3D11DeviceContext1.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.OMSetBlendState" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(35)]
-	public void OMSetBlendState(ID3D11BlendState* pBlendState, float* BlendFactor, uint SampleMask)
+	public void OMSetBlendState(ID3D11BlendState* pBlendState = default, float* BlendFactor = null, uint SampleMask = 0xffffffff)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext1*, ID3D11BlendState*, float*, uint, void>)(lpVtbl[35]))((ID3D11DeviceContext1*)Unsafe.AsPointer(ref this), pBlendState, BlendFactor, SampleMask);
 	}
@@ -533,7 +533,7 @@ public unsafe partial struct ID3D11DeviceContext1 : ID3D11DeviceContext1.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.HSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(60)]
-	public void HSSetShader(ID3D11HullShader* pHullShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void HSSetShader(ID3D11HullShader* pHullShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext1*, ID3D11HullShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[60]))((ID3D11DeviceContext1*)Unsafe.AsPointer(ref this), pHullShader, ppClassInstances, NumClassInstances);
 	}
@@ -565,7 +565,7 @@ public unsafe partial struct ID3D11DeviceContext1 : ID3D11DeviceContext1.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.DSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(64)]
-	public void DSSetShader(ID3D11DomainShader* pDomainShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void DSSetShader(ID3D11DomainShader* pDomainShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext1*, ID3D11DomainShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[64]))((ID3D11DeviceContext1*)Unsafe.AsPointer(ref this), pDomainShader, ppClassInstances, NumClassInstances);
 	}
@@ -605,7 +605,7 @@ public unsafe partial struct ID3D11DeviceContext1 : ID3D11DeviceContext1.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.CSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(69)]
-	public void CSSetShader(ID3D11ComputeShader* pComputeShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void CSSetShader(ID3D11ComputeShader* pComputeShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext1*, ID3D11ComputeShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[69]))((ID3D11DeviceContext1*)Unsafe.AsPointer(ref this), pComputeShader, ppClassInstances, NumClassInstances);
 	}
diff --git a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext2.cs b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext2.cs
index f0ddce5..5ef94de 100644
--- a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext2.cs
+++ b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext2.cs
@@ -125,7 +125,7 @@ public unsafe partial struct ID3D11DeviceContext2 : ID3D11DeviceContext2.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.PSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(9)]
-	public void PSSetShader(ID3D11PixelShader* pPixelShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void PSSetShader(ID3D11PixelShader* pPixelShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext2*, ID3D11PixelShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[9]))((ID3D11DeviceContext2*)Unsafe.AsPointer(ref this), pPixelShader, ppClassInstances, NumClassInstances);
 	}
@@ -141,7 +141,7 @@ public unsafe partial struct ID3D11DeviceContext2 : ID3D11DeviceContext2.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.VSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(11)]
-	public void VSSetShader(ID3D11VertexShader* pVertexShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void VSSetShader(ID3D11VertexShader* pVertexShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext2*, ID3D11VertexShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[11]))((ID3D11DeviceContext2*)Unsafe.AsPointer(ref this), pVertexShader, ppClassInstances, NumClassInstances);
 	}
@@ -237,7 +237,7 @@ public unsafe partial struct ID3D11DeviceContext2 : ID3D11DeviceContext2.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.GSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(23)]
-	public void GSSetShader(ID3D11GeometryShader* pShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void GSSetShader(ID3D11GeometryShader* pShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext2*, ID3D11GeometryShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[23]))((ID3D11DeviceContext2*)Unsafe.AsPointer(ref this), pShader, ppClassInstances, NumClassInstances);
 	}
@@ -333,7 +333,7 @@ public unsafe partial struct ID3D11DeviceContext2 : ID3D11DeviceContext2.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.OMSetBlendState" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(35)]
-	public void OMSetBlendState(ID3D11BlendState* pBlendState, float* BlendFactor, uint SampleMask)
+	public void OMSetBlendState(ID3D11BlendState* pBlendState = default, float* BlendFactor = null, uint SampleMask = 0xffffffff)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext2*, ID3D11BlendState*, float*, uint, void>)(lpVtbl[35]))((ID3D11DeviceContext2*)Unsafe.AsPointer(ref this), pBlendState, BlendFactor, SampleMask);
 	}
@@ -533,7 +533,7 @@ public unsafe partial struct ID3D11DeviceContext2 : ID3D11DeviceContext2.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.HSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(60)]
-	public void HSSetShader(ID3D11HullShader* pHullShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void HSSetShader(ID3D11HullShader* pHullShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext2*, ID3D11HullShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[60]))((ID3D11DeviceContext2*)Unsafe.AsPointer(ref this), pHullShader, ppClassInstances, NumClassInstances);
 	}
@@ -565,7 +565,7 @@ public unsafe partial struct ID3D11DeviceContext2 : ID3D11DeviceContext2.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.DSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(64)]
-	public void DSSetShader(ID3D11DomainShader* pDomainShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void DSSetShader(ID3D11DomainShader* pDomainShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext2*, ID3D11DomainShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[64]))((ID3D11DeviceContext2*)Unsafe.AsPointer(ref this), pDomainShader, ppClassInstances, NumClassInstances);
 	}
@@ -605,7 +605,7 @@ public unsafe partial struct ID3D11DeviceContext2 : ID3D11DeviceContext2.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.CSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(69)]
-	public void CSSetShader(ID3D11ComputeShader* pComputeShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void CSSetShader(ID3D11ComputeShader* pComputeShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext2*, ID3D11ComputeShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[69]))((ID3D11DeviceContext2*)Unsafe.AsPointer(ref this), pComputeShader, ppClassInstances, NumClassInstances);
 	}
diff --git a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext3.cs b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext3.cs
index 0f25be8..5a0de28 100644
--- a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext3.cs
+++ b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext3.cs
@@ -125,7 +125,7 @@ public unsafe partial struct ID3D11DeviceContext3 : ID3D11DeviceContext3.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.PSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(9)]
-	public void PSSetShader(ID3D11PixelShader* pPixelShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void PSSetShader(ID3D11PixelShader* pPixelShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext3*, ID3D11PixelShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[9]))((ID3D11DeviceContext3*)Unsafe.AsPointer(ref this), pPixelShader, ppClassInstances, NumClassInstances);
 	}
@@ -141,7 +141,7 @@ public unsafe partial struct ID3D11DeviceContext3 : ID3D11DeviceContext3.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.VSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(11)]
-	public void VSSetShader(ID3D11VertexShader* pVertexShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void VSSetShader(ID3D11VertexShader* pVertexShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext3*, ID3D11VertexShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[11]))((ID3D11DeviceContext3*)Unsafe.AsPointer(ref this), pVertexShader, ppClassInstances, NumClassInstances);
 	}
@@ -237,7 +237,7 @@ public unsafe partial struct ID3D11DeviceContext3 : ID3D11DeviceContext3.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.GSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(23)]
-	public void GSSetShader(ID3D11GeometryShader* pShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void GSSetShader(ID3D11GeometryShader* pShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext3*, ID3D11GeometryShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[23]))((ID3D11DeviceContext3*)Unsafe.AsPointer(ref this), pShader, ppClassInstances, NumClassInstances);
 	}
@@ -333,7 +333,7 @@ public unsafe partial struct ID3D11DeviceContext3 : ID3D11DeviceContext3.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.OMSetBlendState" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(35)]
-	public void OMSetBlendState(ID3D11BlendState* pBlendState, float* BlendFactor, uint SampleMask)
+	public void OMSetBlendState(ID3D11BlendState* pBlendState = default, float* BlendFactor = null, uint SampleMask = 0xffffffff)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext3*, ID3D11BlendState*, float*, uint, void>)(lpVtbl[35]))((ID3D11DeviceContext3*)Unsafe.AsPointer(ref this), pBlendState, BlendFactor, SampleMask);
 	}
@@ -533,7 +533,7 @@ public unsafe partial struct ID3D11DeviceContext3 : ID3D11DeviceContext3.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.HSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(60)]
-	public void HSSetShader(ID3D11HullShader* pHullShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void HSSetShader(ID3D11HullShader* pHullShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext3*, ID3D11HullShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[60]))((ID3D11DeviceContext3*)Unsafe.AsPointer(ref this), pHullShader, ppClassInstances, NumClassInstances);
 	}
@@ -565,7 +565,7 @@ public unsafe partial struct ID3D11DeviceContext3 : ID3D11DeviceContext3.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.DSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(64)]
-	public void DSSetShader(ID3D11DomainShader* pDomainShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void DSSetShader(ID3D11DomainShader* pDomainShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext3*, ID3D11DomainShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[64]))((ID3D11DeviceContext3*)Unsafe.AsPointer(ref this), pDomainShader, ppClassInstances, NumClassInstances);
 	}
@@ -605,7 +605,7 @@ public unsafe partial struct ID3D11DeviceContext3 : ID3D11DeviceContext3.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.CSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(69)]
-	public void CSSetShader(ID3D11ComputeShader* pComputeShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void CSSetShader(ID3D11ComputeShader* pComputeShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext3*, ID3D11ComputeShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[69]))((ID3D11DeviceContext3*)Unsafe.AsPointer(ref this), pComputeShader, ppClassInstances, NumClassInstances);
 	}
diff --git a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext4.cs b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext4.cs
index cde1635..9e7cd8b 100644
--- a/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext4.cs
+++ b/src/Vortice.Win32.Graphics.Direct3D11/Generated/ID3D11DeviceContext4.cs
@@ -125,7 +125,7 @@ public unsafe partial struct ID3D11DeviceContext4 : ID3D11DeviceContext4.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.PSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(9)]
-	public void PSSetShader(ID3D11PixelShader* pPixelShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void PSSetShader(ID3D11PixelShader* pPixelShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext4*, ID3D11PixelShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[9]))((ID3D11DeviceContext4*)Unsafe.AsPointer(ref this), pPixelShader, ppClassInstances, NumClassInstances);
 	}
@@ -141,7 +141,7 @@ public unsafe partial struct ID3D11DeviceContext4 : ID3D11DeviceContext4.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.VSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(11)]
-	public void VSSetShader(ID3D11VertexShader* pVertexShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void VSSetShader(ID3D11VertexShader* pVertexShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext4*, ID3D11VertexShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[11]))((ID3D11DeviceContext4*)Unsafe.AsPointer(ref this), pVertexShader, ppClassInstances, NumClassInstances);
 	}
@@ -237,7 +237,7 @@ public unsafe partial struct ID3D11DeviceContext4 : ID3D11DeviceContext4.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.GSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(23)]
-	public void GSSetShader(ID3D11GeometryShader* pShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void GSSetShader(ID3D11GeometryShader* pShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext4*, ID3D11GeometryShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[23]))((ID3D11DeviceContext4*)Unsafe.AsPointer(ref this), pShader, ppClassInstances, NumClassInstances);
 	}
@@ -333,7 +333,7 @@ public unsafe partial struct ID3D11DeviceContext4 : ID3D11DeviceContext4.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.OMSetBlendState" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(35)]
-	public void OMSetBlendState(ID3D11BlendState* pBlendState, float* BlendFactor, uint SampleMask)
+	public void OMSetBlendState(ID3D11BlendState* pBlendState = default, float* BlendFactor = null, uint SampleMask = 0xffffffff)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext4*, ID3D11BlendState*, float*, uint, void>)(lpVtbl[35]))((ID3D11DeviceContext4*)Unsafe.AsPointer(ref this), pBlendState, BlendFactor, SampleMask);
 	}
@@ -533,7 +533,7 @@ public unsafe partial struct ID3D11DeviceContext4 : ID3D11DeviceContext4.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.HSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(60)]
-	public void HSSetShader(ID3D11HullShader* pHullShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void HSSetShader(ID3D11HullShader* pHullShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext4*, ID3D11HullShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[60]))((ID3D11DeviceContext4*)Unsafe.AsPointer(ref this), pHullShader, ppClassInstances, NumClassInstances);
 	}
@@ -565,7 +565,7 @@ public unsafe partial struct ID3D11DeviceContext4 : ID3D11DeviceContext4.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.DSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(64)]
-	public void DSSetShader(ID3D11DomainShader* pDomainShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void DSSetShader(ID3D11DomainShader* pDomainShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext4*, ID3D11DomainShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[64]))((ID3D11DeviceContext4*)Unsafe.AsPointer(ref this), pDomainShader, ppClassInstances, NumClassInstances);
 	}
@@ -605,7 +605,7 @@ public unsafe partial struct ID3D11DeviceContext4 : ID3D11DeviceContext4.Interfa
 	/// <inheritdoc cref="ID3D11DeviceContext.CSSetShader" />
 	[MethodImpl(MethodImplOptions.AggressiveInlining)]
 	[VtblIndex(69)]
-	public void CSSetShader(ID3D11ComputeShader* pComputeShader, ID3D11ClassInstance** ppClassInstances, uint NumClassInstances)
+	public void CSSetShader(ID3D11ComputeShader* pComputeShader = null, ID3D11ClassInstance** ppClassInstances = null, uint NumClassInstances = 0)
 	{
 		((delegate* unmanaged[Stdcall]<ID3D11DeviceContext4*, ID3D11ComputeShader*, ID3D11ClassInstance**, uint, void>)(lpVtbl[69]))((ID3D11DeviceContext4*)Unsafe.AsPointer(ref this), pComputeShader, ppClassInstances, NumClassInstances);
 	}
diff --git a/src/Vortice.Win32.Graphics.Direct3D11/ID3D11Device.cs b/src/Vortice.Win32.Graphics.Direct3D11/ID3D11Device.cs
index 5868d0b..b655d42 100644
--- a/src/Vortice.Win32.Graphics.Direct3D11/ID3D11Device.cs
+++ b/src/Vortice.Win32.Graphics.Direct3D11/ID3D11Device.cs
@@ -356,4 +356,40 @@ public static unsafe class ID3D11DeviceExtension
 
         return shader.Move();
     }
+
+    public static HResult CreateInputLayout<TD3D11Device>(ref this TD3D11Device self,
+        ReadOnlySpan<InputElementDescription> inputElements,
+        ReadOnlySpan<byte> shaderBytecode,
+        ID3D11InputLayout** ppInputLayout)
+        where TD3D11Device : unmanaged, ID3D11Device.Interface
+    {
+        fixed (InputElementDescription* pInputElements = inputElements)
+        fixed (byte* pShaderBytecode = shaderBytecode)
+        {
+            return self.CreateInputLayout(
+                pInputElements, (uint)inputElements.Length,
+                pShaderBytecode, (nuint)shaderBytecode.Length,
+                ppInputLayout);
+        }
+    }
+
+    public static ComPtr<ID3D11InputLayout> CreateInputLayout<TD3D11Device>(ref this TD3D11Device self,
+        ReadOnlySpan<InputElementDescription> inputElements,
+        ReadOnlySpan<byte> shaderBytecode)
+        where TD3D11Device : unmanaged, ID3D11Device.Interface
+    {
+        using ComPtr<ID3D11InputLayout> inputLayout = default;
+
+        fixed (InputElementDescription* pInputElements = inputElements)
+        fixed (byte* pShaderBytecode = shaderBytecode)
+        {
+            ThrowIfFailed(self.CreateInputLayout(
+                pInputElements, (uint)inputElements.Length,
+                pShaderBytecode, (nuint)shaderBytecode.Length,
+                inputLayout.GetAddressOf())
+                );
+        }
+
+        return inputLayout.Move();
+    }
 }
diff --git a/src/Vortice.Win32.Graphics.Direct3D11/ID3D11DeviceChild.cs b/src/Vortice.Win32.Graphics.Direct3D11/ID3D11DeviceChild.cs
index c7e3043..6030542 100644
--- a/src/Vortice.Win32.Graphics.Direct3D11/ID3D11DeviceChild.cs
+++ b/src/Vortice.Win32.Graphics.Direct3D11/ID3D11DeviceChild.cs
@@ -32,13 +32,12 @@ public static unsafe class ID3D11DeviceChildExtensions
         {
             fixed (sbyte* valuePtr = value.GetUtf8Span())
             {
-                _ = self.SetPrivateData(ID3D11DeviceChild.D3DDebugObjectNameGuid, (uint)value.Length, valuePtr);
+                _ = self.SetPrivateData(ID3D11DeviceChild.D3DDebugObjectNameGuid, (uint)value!.Length, valuePtr);
             }
         }
     }
 }
 
-
 public unsafe partial struct ID3D11DeviceChild
 {
     public static ref readonly Guid WKPDID_D3DDebugObjectName