diff --git a/build/SharpDX.props b/build/SharpDX.props
index e381bc03e6..de5dc9e926 100644
--- a/build/SharpDX.props
+++ b/build/SharpDX.props
@@ -1,8 +1,8 @@
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
-    <PackageReference Include="SharpDX" Version="3.1.1" />
-    <PackageReference Include="SharpDX.Direct2D1" Version="3.1.1" />
-    <PackageReference Include="SharpDX.Direct3D11" Version="3.1.1" />
-    <PackageReference Include="SharpDX.DXGI" Version="3.1.1" />
+    <PackageReference Include="SharpDX" Version="4.0.0" />
+    <PackageReference Include="SharpDX.Direct2D1" Version="4.0.0" />
+    <PackageReference Include="SharpDX.Direct3D11" Version="4.0.0" />
+    <PackageReference Include="SharpDX.DXGI" Version="4.0.0" />
   </ItemGroup>
 </Project>
diff --git a/samples/BindingTest/App.config b/samples/BindingTest/App.config
index d9f870f27b..373b3a13f8 100644
--- a/samples/BindingTest/App.config
+++ b/samples/BindingTest/App.config
@@ -1,21 +1,21 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
     </startup>
   <runtime>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
-        <assemblyIdentity name="SharpDX" publicKeyToken="b4dcf0f35e5521f1" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0" />
+        <assemblyIdentity name="SharpDX" publicKeyToken="b4dcf0f35e5521f1" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="SharpDX.DXGI" publicKeyToken="b4dcf0f35e5521f1" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0" />
+        <assemblyIdentity name="SharpDX.DXGI" publicKeyToken="b4dcf0f35e5521f1" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="Mono.Cairo" publicKeyToken="0738eb9f132ed756" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
+        <assemblyIdentity name="Mono.Cairo" publicKeyToken="0738eb9f132ed756" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0"/>
       </dependentAssembly>
     </assemblyBinding>
   </runtime>
diff --git a/samples/BindingTest/BindingTest.csproj b/samples/BindingTest/BindingTest.csproj
index 1c4e4f8169..f2db8d3f46 100644
--- a/samples/BindingTest/BindingTest.csproj
+++ b/samples/BindingTest/BindingTest.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>BindingTest</RootNamespace>
     <AssemblyName>BindingTest</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <TargetFrameworkProfile />
diff --git a/samples/ControlCatalog.Desktop/App.config b/samples/ControlCatalog.Desktop/App.config
index 10a06d8258..68403e421f 100644
--- a/samples/ControlCatalog.Desktop/App.config
+++ b/samples/ControlCatalog.Desktop/App.config
@@ -1,21 +1,21 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
     </startup>
   <runtime>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
-        <assemblyIdentity name="Mono.Cairo" publicKeyToken="0738eb9f132ed756" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
+        <assemblyIdentity name="Mono.Cairo" publicKeyToken="0738eb9f132ed756" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="SharpDX" publicKeyToken="b4dcf0f35e5521f1" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0" />
+        <assemblyIdentity name="SharpDX" publicKeyToken="b4dcf0f35e5521f1" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="SharpDX.DXGI" publicKeyToken="b4dcf0f35e5521f1" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0" />
+        <assemblyIdentity name="SharpDX.DXGI" publicKeyToken="b4dcf0f35e5521f1" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0"/>
       </dependentAssembly>
     </assemblyBinding>
   </runtime>
diff --git a/samples/ControlCatalog.Desktop/ControlCatalog.Desktop.csproj b/samples/ControlCatalog.Desktop/ControlCatalog.Desktop.csproj
index e215105149..403ab7065b 100644
--- a/samples/ControlCatalog.Desktop/ControlCatalog.Desktop.csproj
+++ b/samples/ControlCatalog.Desktop/ControlCatalog.Desktop.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>ControlCatalog.Desktop</RootNamespace>
     <AssemblyName>ControlCatalog.Desktop</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <TargetFrameworkProfile />
diff --git a/samples/RenderTest/App.config b/samples/RenderTest/App.config
index 10a06d8258..68403e421f 100644
--- a/samples/RenderTest/App.config
+++ b/samples/RenderTest/App.config
@@ -1,21 +1,21 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
     </startup>
   <runtime>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
-        <assemblyIdentity name="Mono.Cairo" publicKeyToken="0738eb9f132ed756" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
+        <assemblyIdentity name="Mono.Cairo" publicKeyToken="0738eb9f132ed756" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="SharpDX" publicKeyToken="b4dcf0f35e5521f1" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0" />
+        <assemblyIdentity name="SharpDX" publicKeyToken="b4dcf0f35e5521f1" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="SharpDX.DXGI" publicKeyToken="b4dcf0f35e5521f1" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0" />
+        <assemblyIdentity name="SharpDX.DXGI" publicKeyToken="b4dcf0f35e5521f1" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0"/>
       </dependentAssembly>
     </assemblyBinding>
   </runtime>
diff --git a/samples/RenderTest/RenderTest.csproj b/samples/RenderTest/RenderTest.csproj
index cf32316086..ea876ba4f2 100644
--- a/samples/RenderTest/RenderTest.csproj
+++ b/samples/RenderTest/RenderTest.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>RenderTest</RootNamespace>
     <AssemblyName>RenderTest</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <TargetFrameworkProfile />
diff --git a/samples/VirtualizationTest/App.config b/samples/VirtualizationTest/App.config
index 10a06d8258..68403e421f 100644
--- a/samples/VirtualizationTest/App.config
+++ b/samples/VirtualizationTest/App.config
@@ -1,21 +1,21 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <configuration>
     <startup> 
-        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
     </startup>
   <runtime>
     <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
       <dependentAssembly>
-        <assemblyIdentity name="Mono.Cairo" publicKeyToken="0738eb9f132ed756" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
+        <assemblyIdentity name="Mono.Cairo" publicKeyToken="0738eb9f132ed756" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="SharpDX" publicKeyToken="b4dcf0f35e5521f1" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0" />
+        <assemblyIdentity name="SharpDX" publicKeyToken="b4dcf0f35e5521f1" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0"/>
       </dependentAssembly>
       <dependentAssembly>
-        <assemblyIdentity name="SharpDX.DXGI" publicKeyToken="b4dcf0f35e5521f1" culture="neutral" />
-        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0" />
+        <assemblyIdentity name="SharpDX.DXGI" publicKeyToken="b4dcf0f35e5521f1" culture="neutral"/>
+        <bindingRedirect oldVersion="0.0.0.0-3.1.1.0" newVersion="3.1.1.0"/>
       </dependentAssembly>
     </assemblyBinding>
   </runtime>
diff --git a/samples/VirtualizationTest/VirtualizationTest.csproj b/samples/VirtualizationTest/VirtualizationTest.csproj
index 9b9d8a94c6..81046f4ef4 100644
--- a/samples/VirtualizationTest/VirtualizationTest.csproj
+++ b/samples/VirtualizationTest/VirtualizationTest.csproj
@@ -9,7 +9,7 @@
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>VirtualizationTest</RootNamespace>
     <AssemblyName>VirtualizationTest</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
     <FileAlignment>512</FileAlignment>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <TargetFrameworkProfile />
diff --git a/src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj b/src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj
index cf5a055df8..ae52fa01e6 100644
--- a/src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj
+++ b/src/Windows/Avalonia.Direct2D1/Avalonia.Direct2D1.csproj
@@ -1,46 +1,30 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{3E908F67-5543-4879-A1DC-08EACE79B3CD}</ProjectGuid>
-    <OutputType>Library</OutputType>
-    <AppDesignerFolder>Properties</AppDesignerFolder>
-    <RootNamespace>Avalonia.Direct2D1</RootNamespace>
-    <AssemblyName>Avalonia.Direct2D1</AssemblyName>
-    <TargetFrameworkVersion>v4.5</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <NuGetPackageImportStamp>
-    </NuGetPackageImportStamp>
+    <TargetFramework>netstandard1.3</TargetFramework>
+    <GenerateAssemblyInfo>false</GenerateAssemblyInfo>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+  <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
     <DebugSymbols>true</DebugSymbols>
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DefineConstants>DEBUG;TRACE;NETSTANDARD</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Debug\Avalonia.Direct2D1.XML</DocumentationFile>
+    <DocumentationFile>bin\Debug\Avalonia.Controls.XML</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
   </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
     <DebugType>pdbonly</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
+    <DefineConstants>TRACE;NETSTANDARD</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
-    <DocumentationFile>bin\Release\Avalonia.Direct2D1.XML</DocumentationFile>
+    <DocumentationFile>bin\Release\Avalonia.Controls.XML</DocumentationFile>
     <NoWarn>CS1591</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
-  <ItemGroup>
-    <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="Microsoft.CSharp" />
-  </ItemGroup>
   <ItemGroup>
     <Compile Include="..\..\Shared\SharedAssemblyInfo.cs">
       <Link>Properties\SharedAssemblyInfo.cs</Link>
@@ -48,74 +32,19 @@
     <Compile Include="..\Avalonia.Win32\Interop\UnmanagedMethods.cs">
       <Link>UnmanagedMethods.cs</Link>
     </Compile>
-    <Compile Include="Direct2D1Platform.cs" />
-    <Compile Include="Disposable.cs" />
-    <Compile Include="ExternalRenderTarget.cs" />
-    <Compile Include="HwndRenderTarget.cs" />
-    <Compile Include="IExternalDirect2DRenderTargetSurface.cs" />
-    <Compile Include="Media\BrushImpl.cs" />
-    <Compile Include="Media\BrushWrapper.cs" />
-    <Compile Include="Media\DrawingContextImpl.cs" />
-    <Compile Include="Media\ImageBrushImpl.cs" />
-    <Compile Include="Media\Imaging\BitmapImpl.cs" />
-    <Compile Include="Media\Imaging\D2DBitmapImpl.cs" />
-    <Compile Include="Media\Imaging\RenderTargetBitmapImpl.cs" />
-    <Compile Include="Media\Imaging\WicBitmapImpl.cs" />
-    <Compile Include="Media\Imaging\WritableWicBitmapImpl.cs" />
-    <Compile Include="Media\RadialGradientBrushImpl.cs" />
-    <Compile Include="Media\LinearGradientBrushImpl.cs" />
-    <Compile Include="Media\AvaloniaTextRenderer.cs" />
-    <Compile Include="Media\SolidColorBrushImpl.cs" />
-    <Compile Include="Media\StreamGeometryContextImpl.cs" />
-    <Compile Include="Media\GeometryImpl.cs" />
-    <Compile Include="Media\StreamGeometryImpl.cs" />
-    <Compile Include="Media\FormattedTextImpl.cs" />
-    <Compile Include="Media\TransformedGeometryImpl.cs" />
-    <Compile Include="PrimitiveExtensions.cs" />
-    <Compile Include="Properties\AssemblyInfo.cs" />
-    <Compile Include="RenderTarget.cs" />
-    <Compile Include="SwapChainRenderTarget.cs" />
-    <Compile Include="Direct2DChecker.cs" />
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="app.config" />
   </ItemGroup>
   <ItemGroup>
-    <ProjectReference Include="..\..\Avalonia.Animation\Avalonia.Animation.csproj">
-      <Project>{D211E587-D8BC-45B9-95A4-F297C8FA5200}</Project>
-      <Name>Avalonia.Animation</Name>
-    </ProjectReference>
-    <ProjectReference Include="..\..\Avalonia.Base\Avalonia.Base.csproj">
-      <Project>{B09B78D8-9B26-48B0-9149-D64A2F120F3F}</Project>
-      <Name>Avalonia.Base</Name>
-    </ProjectReference>
-    <ProjectReference Include="..\..\Avalonia.Controls\Avalonia.Controls.csproj">
-      <Project>{d2221c82-4a25-4583-9b43-d791e3f6820c}</Project>
-      <Name>Avalonia.Controls</Name>
-    </ProjectReference>
-    <ProjectReference Include="..\..\Avalonia.Input\Avalonia.Input.csproj">
-      <Project>{62024b2d-53eb-4638-b26b-85eeaa54866e}</Project>
-      <Name>Avalonia.Input</Name>
-    </ProjectReference>
-    <ProjectReference Include="..\..\Avalonia.Interactivity\Avalonia.Interactivity.csproj">
-      <Project>{6b0ed19d-a08b-461c-a9d9-a9ee40b0c06b}</Project>
-      <Name>Avalonia.Interactivity</Name>
-    </ProjectReference>
-    <ProjectReference Include="..\..\Avalonia.Layout\Avalonia.Layout.csproj">
-      <Project>{42472427-4774-4C81-8AFF-9F27B8E31721}</Project>
-      <Name>Avalonia.Layout</Name>
-    </ProjectReference>
-    <ProjectReference Include="..\..\Avalonia.Visuals\Avalonia.Visuals.csproj">
-      <Project>{EB582467-6ABB-43A1-B052-E981BA910E3A}</Project>
-      <Name>Avalonia.Visuals</Name>
-    </ProjectReference>
-    <ProjectReference Include="..\..\Avalonia.Styling\Avalonia.Styling.csproj">
-      <Project>{f1baa01a-f176-4c6a-b39d-5b40bb1b148f}</Project>
-      <Name>Avalonia.Styling</Name>
-    </ProjectReference>
+    <ProjectReference Include="..\..\Avalonia.Animation\Avalonia.Animation.csproj" />
+    <ProjectReference Include="..\..\Avalonia.Base\Avalonia.Base.csproj" />
+    <ProjectReference Include="..\..\Avalonia.Controls\Avalonia.Controls.csproj" />
+    <ProjectReference Include="..\..\Avalonia.Input\Avalonia.Input.csproj" />
+    <ProjectReference Include="..\..\Avalonia.Interactivity\Avalonia.Interactivity.csproj" />
+    <ProjectReference Include="..\..\Avalonia.Layout\Avalonia.Layout.csproj" />
+    <ProjectReference Include="..\..\Avalonia.Visuals\Avalonia.Visuals.csproj" />
+    <ProjectReference Include="..\..\Avalonia.Styling\Avalonia.Styling.csproj" />
   </ItemGroup>
-  <Import Project="..\..\Shared\RenderHelpers\RenderHelpers.projitems" Label="Shared" />
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+  <Import Project="..\..\..\build\Rx.props" />
   <Import Project="..\..\..\build\SharpDX.props" />
-  <Import Project="$(MSBuildThisFileDirectory)..\..\Shared\nuget.workaround.targets" />
-</Project>
\ No newline at end of file
+  <Import Project="..\..\Shared\RenderHelpers\RenderHelpers.projitems" Label="Shared" />
+  <Import Project="..\..\..\build\JetBrains.Annotations.props" />
+</Project>
diff --git a/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs b/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
index fe04d2c011..ccfce45605 100644
--- a/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
+++ b/src/Windows/Avalonia.Win32/Interop/UnmanagedMethods.cs
@@ -922,7 +922,9 @@ namespace Avalonia.Win32.Interop
         [StructLayout(LayoutKind.Sequential)]
         internal class MONITORINFO
         {
+#pragma warning disable CS0618 // Type or member is obsolete
             public int cbSize = Marshal.SizeOf(typeof(MONITORINFO));
+#pragma warning restore CS0618 // Type or member is obsolete
             public RECT rcMonitor = new RECT();
             public RECT rcWork = new RECT();
             public int dwFlags = 0;