Migrate DWrite Factory to managed.

Contributes to dotnet#5305

src/Microsoft.DotNet.Wpf/src/Common/src/Interop/Windows/Interop.HRESULT_FROM_WIN32.cs

@@ -0,0 +1,19 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Runtime.CompilerServices;
+
+internal static partial class Interop
+{
+    // Implementation of HRESULT_FROM_WIN32 macro
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    internal static int HRESULT_FROM_WIN32(int errorCode)
+    {
+        if (errorCode <= 0 || (errorCode & 0x80000000) == 0x80000000)
+        {
+            return errorCode;
+        }
+
+        return (errorCode & 0x0000FFFF) | unchecked((int)0x80070000);
+    }
+}

src/Microsoft.DotNet.Wpf/src/Common/src/Interop/Windows/Kernel32/Interop.FreeLibrary.cs

@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Kernel32
+    {
+        [DllImport(Libraries.Kernel32, SetLastError = true, ExactSpelling = true)]
+        internal static extern int FreeLibrary(IntPtr hModule);
+    }
+}

src/Microsoft.DotNet.Wpf/src/Common/src/Interop/Windows/Kernel32/Interop.GetModuleHandle.cs

@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Kernel32
+    {
+        [DllImport(Libraries.Kernel32, CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]
+        internal static extern IntPtr GetModuleHandleW(string moduleName);
+    }
+}

src/Microsoft.DotNet.Wpf/src/Common/src/Interop/Windows/Kernel32/Interop.GetProcAddress.cs

@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Kernel32
+    {
+        [DllImport(Libraries.Kernel32, CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
+        internal static extern IntPtr GetProcAddress(IntPtr hModule, string lpProcName);
+    }
+}

src/Microsoft.DotNet.Wpf/src/Common/src/Interop/Windows/Kernel32/Interop.LoadLibrary.cs

@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Kernel32
+    {
+        [DllImport(Libraries.Kernel32, CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]
+        internal static extern IntPtr LoadLibraryW(string libFilename);
+    }
+}

src/Microsoft.DotNet.Wpf/src/Common/src/Interop/Windows/Kernel32/Interop.LoadLibraryEx.cs

@@ -0,0 +1,16 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Kernel32
+    {
+        public const int LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800;
+
+        [DllImport(Libraries.Kernel32, CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true)]
+        internal static extern IntPtr LoadLibraryExW(string lpwLibFileName, IntPtr hFile, uint dwFlags);
+    }
+}