Initial Commit

.gitignore

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+*.swp
+*.*~
+project.lock.json
+.DS_Store
+*.pyc
+nupkg/
+
+# Visual Studio Code
+.vscode/
+
+# Rider
+.idea/
+
+# Visual Studio
+.vs/
+
+# Fleet
+.fleet/
+
+# Code Rush
+.cr/
+
+# User-specific files
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Build results
+[Dd]ebug/
+[Dd]ebugPublic/
+[Rr]elease/
+[Rr]eleases/
+x64/
+x86/
+build/
+bld/
+[Bb]in/
+[Oo]bj/
+[Oo]ut/
+msbuild.log
+msbuild.err
+msbuild.wrn

Program.cs

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+using System.Diagnostics;
+using Vanara.PInvoke;
+
+namespace WO3U.Fix
+{
+    class Program
+    {
+        private const string STEAM_RUN_CMD = @"steam://rungameid/1879330";
+        private const string PROCESS_NAME = @"WO3U";
+
+        private static void StartSteamGame()
+        {
+            var startInfo = new ProcessStartInfo
+            {
+                FileName = STEAM_RUN_CMD,
+                UseShellExecute = true
+            };
+
+            using (var process = new Process())
+            {
+                process.StartInfo = startInfo;
+                process.Start();
+
+                process.WaitForExit();
+            }
+        }
+
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Trying to set RefreshRate to 60Hz...");
+
+            var devMode = new DEVMODE();
+            User32.EnumDisplaySettings(null, User32.ENUM_CURRENT_SETTINGS, ref devMode);
+
+            uint defaultFrequency = devMode.dmDisplayFrequency;
+            devMode.dmDisplayFrequency = 60; // Max FPS for Warriors Orochi 3 Ultimate
+
+            int result = User32.ChangeDisplaySettings(in devMode, User32.ChangeDisplaySettingsFlags.CDS_DEFAULT);
+            if (result != 0)
+            {
+                Console.WriteLine("Oh no! :(" + Environment.NewLine + "Couldn't set DisplayFrequency.");
+                return;
+            }
+
+            Console.WriteLine("RefreshRate got set. Starting Warriors Orochi 3 Ultimate...");
+
+            bool cancel = false;
+            Console.CancelKeyPress += (sender, e) => {
+                e.Cancel = true;
+                cancel = true;
+            };
+
+            try
+            {
+                StartSteamGame();
+                Console.WriteLine("Waiting for the Game to run. Press Ctrl+C to abort.");
+
+                Process? wo3uProcess = null;
+                while (wo3uProcess is null)
+                {
+                    if (cancel) return;
+
+                    Console.WriteLine("Wait for WO3U.exe...");
+                    Thread.Sleep(1000);
+                    wo3uProcess = Process.GetProcessesByName(PROCESS_NAME).FirstOrDefault();
+                }
+
+                Console.WriteLine($"Found WO3U.exe with ProcessID {wo3uProcess.Id}");
+
+                wo3uProcess.WaitForExit();
+                Console.WriteLine("Game exited. Reset RefreshRate...");
+            }
+            finally
+            {
+                // Reset RefreshRate
+                devMode.dmDisplayFrequency = defaultFrequency;
+                User32.ChangeDisplaySettings(in devMode, User32.ChangeDisplaySettingsFlags.CDS_DEFAULT);
+            }
+        }
+    }
+}

WO3U.Fix.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <PublishSingleFile>true</PublishSingleFile>
+    <SelfContained>false</SelfContained>
+    <RuntimeIdentifier>win-x64</RuntimeIdentifier>
+    <Nullable>enable</Nullable>
+    <ApplicationIcon>1.ico</ApplicationIcon>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Vanara.PInvoke.User32" Version="3.4.17" />
+  </ItemGroup>
+
+</Project>

WO3U.Fix.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.5.002.0
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "WO3U.Fix", "WO3U.Fix.csproj", "{EB66D68B-71A8-4A27-AF42-C462CEEB2ADA}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{EB66D68B-71A8-4A27-AF42-C462CEEB2ADA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EB66D68B-71A8-4A27-AF42-C462CEEB2ADA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EB66D68B-71A8-4A27-AF42-C462CEEB2ADA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EB66D68B-71A8-4A27-AF42-C462CEEB2ADA}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {2A0DC39B-2E70-4FD7-8EF5-50232230F742}
+	EndGlobalSection
+EndGlobal