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More nullability work on DwmApi

nullableenabled
David Hall 2023-10-01 20:55:38 -06:00
parent da884b1557
commit 009afeee89
3 changed files with 8 additions and 5 deletions
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10
PInvoke/DwmApi/DwmApi.cs
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@ -599,7 +599,7 @@ public static partial class DwmApi
/// <returns>If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
[DllImport(Lib.DwmApi, SetLastError = false, ExactSpelling = true)]
[PInvokeData("dwmapi.h")]
public static extern HRESULT DwmGetCompositionTimingInfo(HWND hwnd, ref DWM_TIMING_INFO dwAttribute);
public static extern HRESULT DwmGetCompositionTimingInfo([Optional] HWND hwnd, ref DWM_TIMING_INFO dwAttribute);
/// <summary>Retrieves transport attributes.</summary>
/// <param name="pfIsRemoting">
@ -827,12 +827,12 @@ public static partial class DwmApi
/// </param>
/// <returns>If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.</returns>
[PInvokeData("dwmapi.h")]
public static HRESULT DwmSetWindowAttribute<T>(HWND hwnd, DWMWINDOWATTRIBUTE dwAttribute, [In] T pvAttribute)
public static HRESULT DwmSetWindowAttribute<T>(HWND hwnd, DWMWINDOWATTRIBUTE dwAttribute, [In] T? pvAttribute)
{
if (pvAttribute == null || !CorrespondingTypeAttribute.CanSet(dwAttribute, typeof(T))) throw new ArgumentException();
var attr = pvAttribute is bool ? Convert.ToUInt32(pvAttribute) : (pvAttribute.GetType().IsEnum ? Convert.ChangeType(pvAttribute, Enum.GetUnderlyingType(pvAttribute.GetType())) : pvAttribute);
using (var p = new PinnedObject(attr))
return DwmSetWindowAttribute(hwnd, dwAttribute, p, Marshal.SizeOf(attr));
using var p = new PinnedObject(attr);
return DwmSetWindowAttribute(hwnd, dwAttribute, p, Marshal.SizeOf(attr));
}
/// <summary>
@ -1236,7 +1236,7 @@ public static partial class DwmApi
{
int RotateLeft(int value, int nBits)
{
nBits = nBits % 0x20;
nBits %= 0x20;
return (value << nBits) | (value >> (0x20 - nBits));
}
return cxLeftWidth ^ RotateLeft(cyTopHeight, 8) ^ RotateLeft(cxRightWidth, 0x10) ^ RotateLeft(cyBottomHeight, 0x18);

2
UnitTests/PInvoke/DwmApi/DwmApi.csproj
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@ -1,6 +1,8 @@
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<AssemblyName>UnitTest.PInvoke.DwmApi</AssemblyName>
<TargetFramework>$(TargetFramework)-windows</TargetFramework>
<UseWindowsForms>true</UseWindowsForms>
</PropertyGroup>
<ItemGroup>
<Reference Include="System.Windows.Forms" />

1
UnitTests/PInvoke/DwmApi/DwmApiTests.cs
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@ -1,6 +1,7 @@
using NUnit.Framework;
using System.Drawing;
using System.Threading;
using System.Windows.Forms;
using static Vanara.PInvoke.DwmApi;
namespace Vanara.PInvoke.Tests;