Fexty12573 · Pizzabelly · May 21, 2026
diff --git a/mhw-cs-plugin-loader.slnx b/mhw-cs-plugin-loader.slnx
@@ -62,6 +62,10 @@
   </Folder>
   <Folder Name="/Native/">
     <Project Path="dependencies/cimgui/cimgui.vcxproj" Id="56f04c3c-a690-34fc-a27a-995c51114a40" />
+    <Project Path="mhw-cs-plugin-loader/Launcher/Launcher.vcxproj" Id="1fa71114-1187-4059-9523-196a234c1b94">
+      <BuildType Solution="MinSizeRel|*" Project="Release" />
+      <BuildType Solution="RelWithDebInfo|*" Project="Debug" />
+    </Project>
     <Project Path="mhw-cs-plugin-loader/mhw-cs-plugin-loader.vcxproj" Id="9267fd61-f5bf-4190-b327-8385f8576479">
       <BuildType Solution="MinSizeRel|*" Project="Release" />
       <BuildType Solution="RelWithDebInfo|*" Project="Release" />

diff --git a/mhw-cs-plugin-loader/Launcher/Launcher.c b/mhw-cs-plugin-loader/Launcher/Launcher.c
@@ -0,0 +1,94 @@
+// cl.exe Launcher.c kernel32.lib user32.lib /link /SUBSYSTEM:windows /NODEFAULTLIB /ENTRY:WinMainCRTStartup
+
+#include <windows.h>
+#include <tlhelp32.h>
+
+#define TARGET_EXE "MonsterHunterWorld.exe"
+#define TARGET_DLL "winmm.dll"
+
+static DWORD (*K32GetModuleBaseNameA)(IN HANDLE hProcess, IN HMODULE hModule, OUT LPSTR lpBaseName, IN DWORD nSize);
+static BOOL (*K32EnumProcessModules)(IN HANDLE hProcess, OUT HMODULE *lphModule, IN DWORD cb, OUT LPDWORD lpcbNeeded);
+
+// MonsterHunterWorld.exe -> ntdll.dll -> KERNEL32.dll -> KERNELBASE.dll -> (apphelp.dll) -> TARGET_DLL + dependencies.
+// () = Present on Windows and not Wine (Windows 11, Proton 11.0).
+// Total modules varies between Windows and Wine, 64 is plenty in the case of MHW and likely most scenarios.
+static HMODULE moduleHandles[64];
+static CHAR moduleName[MAX_MODULE_NAME32 + 1];
+static CHAR dllPath[MAX_PATH];
+
+// https://git.musl-libc.org/cgit/musl/tree/src/string/strncmp.c
+static int Strncmp(const char *_l, const char *_r, size_t n)
+{
+	const unsigned char *l=(void *)_l, *r=(void *)_r;
+	if (!n--) return 0;
+	for (; *l && *r && n && *l == *r ; l++, r++, n--);
+	return *l - *r;
+}
+
+static BOOL DllWasInjected(HANDLE process)
+{
+    DWORD cbNeeded;
+    if (K32EnumProcessModules(process, moduleHandles, sizeof(moduleHandles), &cbNeeded)) {
+        DWORD processCount = cbNeeded / sizeof(HMODULE);
+        for (DWORD i = 0; i < processCount; i++) {
+            K32GetModuleBaseNameA(process, moduleHandles[i], moduleName, sizeof(moduleName));
+            if (Strncmp(TARGET_DLL, moduleName, sizeof(TARGET_DLL)) == 0) {
+                return TRUE;
+            }
+        }
+    }
+    return FALSE;
+}
+
+void __stdcall WinMainCRTStartup()
+{
+    HMODULE k32 = GetModuleHandleA("kernel32.dll");
+    LPVOID LoadLibraryAddr = (LPVOID)GetProcAddress(k32, "LoadLibraryA");
+    K32GetModuleBaseNameA = (LPVOID)GetProcAddress(k32, "K32GetModuleBaseNameA");
+    K32EnumProcessModules = (LPVOID)GetProcAddress(k32, "K32EnumProcessModules");
+
+    STARTUPINFOA si = { .cb = sizeof(si) };
+    PROCESS_INFORMATION pi = { 0 };
+    if (CreateProcessA(NULL, TARGET_EXE, NULL, NULL, FALSE, CREATE_SUSPENDED, NULL, NULL, &si, &pi) == 0) {
+        MessageBoxA(NULL,
+            "Failed to create process. Is '" TARGET_EXE "' contained within this folder?",
+            "Launch Error",
+            MB_ICONERROR | MB_OK);
+        ExitProcess(1);
+    }
+
+    DWORD arglen = GetFullPathNameA(TARGET_DLL, sizeof(dllPath), dllPath, NULL);
+    LPVOID buf = VirtualAllocEx(pi.hProcess, NULL, arglen, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+    WriteProcessMemory(pi.hProcess, buf, dllPath, arglen, NULL);
+
+    HANDLE hThread = CreateRemoteThread(pi.hProcess, NULL, 0, (LPTHREAD_START_ROUTINE)LoadLibraryAddr, buf, 0, NULL);
+    if (!hThread) {
+        MessageBoxA(NULL,
+            "Failed to CreateRemoteThread(), make sure the architecture of this exe matches " TARGET_EXE ".",
+            "Injection Failed",
+            MB_ICONWARNING | MB_OK);
+    } else {
+        WaitForSingleObject(hThread, INFINITE);
+        // The value of GetExitCodeThread() isn't usable, so try to manually check
+        // if the DLL got loaded (LoadLibrary() succeeded).
+        if (!DllWasInjected(pi.hProcess)) {
+            MessageBoxA(NULL,
+                "Failed to inject DLL. Is '" TARGET_DLL "' contained within this folder?",
+                "Injection Failed",
+                MB_ICONWARNING | MB_OK);
+        }
+        CloseHandle(hThread);
+    }
+
+    VirtualFreeEx(pi.hProcess, buf, 0, MEM_RELEASE);
+
+    ResumeThread(pi.hThread);
+
+    WaitForSingleObject(pi.hProcess, INFINITE);
+    CloseHandle(pi.hProcess);
+    CloseHandle(pi.hThread);
+
+    FreeLibrary(k32);
+
+    ExitProcess(0);
+}
diff --git a/mhw-cs-plugin-loader/Launcher/Launcher.ico b/mhw-cs-plugin-loader/Launcher/Launcher.ico
diff --git a/mhw-cs-plugin-loader/Launcher/Launcher.rc b/mhw-cs-plugin-loader/Launcher/Launcher.rc
diff --git a/mhw-cs-plugin-loader/Launcher/Launcher.vcxproj b/mhw-cs-plugin-loader/Launcher/Launcher.vcxproj
@@ -0,0 +1,100 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup Label="ProjectConfigurations">
+    <ProjectConfiguration Include="Debug|x64">
+      <Configuration>Debug</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
+      <Platform>x64</Platform>
+    </ProjectConfiguration>
+  </ItemGroup>
+  <PropertyGroup Label="Globals">
+    <VCProjectVersion>17.0</VCProjectVersion>
+    <Keyword>Win32Proj</Keyword>
+    <ProjectGuid>{1fa71114-1187-4059-9523-196a234c1b94}</ProjectGuid>
+    <RootNamespace>Launcher</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>true</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <CharacterSet>NotSet</CharacterSet>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
+    <ConfigurationType>Application</ConfigurationType>
+    <UseDebugLibraries>false</UseDebugLibraries>
+    <PlatformToolset>v143</PlatformToolset>
+    <WholeProgramOptimization>true</WholeProgramOptimization>
+    <CharacterSet>NotSet</CharacterSet>
+  </PropertyGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
+  <ImportGroup Label="ExtensionSettings">
+  </ImportGroup>
+  <ImportGroup Label="Shared">
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <TargetName>SPLLauncher</TargetName>
+    <EmbedManifest>false</EmbedManifest>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <TargetName>SPLLauncher</TargetName>
+    <EmbedManifest>false</EmbedManifest>
+  </PropertyGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <SDLCheck>false</SDLCheck>
+      <PreprocessorDefinitions>_DEBUG;%(PreprocessorDefinitions);WIN32_LEAN_AND_MEAN</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+      <BasicRuntimeChecks>Default</BasicRuntimeChecks>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <IgnoreAllDefaultLibraries>Yes</IgnoreAllDefaultLibraries>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
+    <ClCompile>
+      <WarningLevel>Level3</WarningLevel>
+      <FunctionLevelLinking>true</FunctionLevelLinking>
+      <IntrinsicFunctions>true</IntrinsicFunctions>
+      <SDLCheck>false</SDLCheck>
+      <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions);WIN32_LEAN_AND_MEAN</PreprocessorDefinitions>
+      <ConformanceMode>true</ConformanceMode>
+      <BufferSecurityCheck>false</BufferSecurityCheck>
+    </ClCompile>
+    <Link>
+      <SubSystem>Windows</SubSystem>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
+      <IgnoreAllDefaultLibraries>Yes</IgnoreAllDefaultLibraries>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup>
+    <ClCompile Include="Launcher.c" />
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="resource.h" />
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="Launcher.rc" />
+  </ItemGroup>
+  <ItemGroup>
+    <Image Include="Launcher.ico" />
+  </ItemGroup>
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+  </ImportGroup>
+</Project>
diff --git a/mhw-cs-plugin-loader/Launcher/Launcher.vcxproj.filters b/mhw-cs-plugin-loader/Launcher/Launcher.vcxproj.filters
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <Filter Include="Source Files">
+      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
+      <Extensions>cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx</Extensions>
+    </Filter>
+    <Filter Include="Resource Files">
+      <UniqueIdentifier>{67DA6AB6-F800-4c08-8B7A-83BB121AAD01}</UniqueIdentifier>
+      <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
+    </Filter>
+  </ItemGroup>
+  <ItemGroup>
+    <ClCompile Include="Launcher.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <Image Include="Launcher.ico">
+      <Filter>Resource Files</Filter>
+    </Image>
+  </ItemGroup>
+  <ItemGroup>
+    <ResourceCompile Include="Launcher.rc">
+      <Filter>Resource Files</Filter>
+    </ResourceCompile>
+  </ItemGroup>
+  <ItemGroup>
+    <ClInclude Include="resource.h">
+      <Filter>Resource Files</Filter>
+    </ClInclude>
+  </ItemGroup>
+</Project>
diff --git a/mhw-cs-plugin-loader/Launcher/create_icon.sh b/mhw-cs-plugin-loader/Launcher/create_icon.sh
@@ -0,0 +1,3 @@
+#! /usr/bin/env sh
+# -define icon:auto-resize=256,128,96,64,48,32,16
+magick -density 512 -define icon:auto-resize=32 -background none ../../docs/images/SPL.svg Launcher.ico
diff --git a/mhw-cs-plugin-loader/Launcher/resource.h b/mhw-cs-plugin-loader/Launcher/resource.h
@@ -0,0 +1,16 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by Launcher.rc
+//
+#define IDI_ICON1                       101
+
+// Next default values for new objects
+// 
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        102
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif