first commit (👑)

.gitignore

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+.idea/
+node_modules/
+package-lock.json
+dist/
+build/

README.md

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+# Electron As Wallpaper (✨)
+
+> set your electron window as wallpaper behind desktop icons
+---
+
+<div align="center">
+
+![license](https://badgen.net/badge/license/MIT/blue)
+![stars](https://badgen.net/npm/v/electron-as-wallpaper)
+![forks](https://badgen.net/npm/dw/electron-as-wallpaper)
+![issues](https://badgen.net/github/issues/meslzy/electron-as-wallpaper)
+
+</div>
+
+---
+
+<div align="center">
+
+![issues](assets/app.gif)
+
+<a href="https://github.com/meslzy/electron-as-wallpaper">`try the app`</a>
+
+</div>
+
+---
+
+## Getting Started (✅)
+
+- ### Installation (⏬)
+	- `npm install electron-as-wallpaper --save`
+
+- ### How to use (🌠)
+  ```js
+	 import {attach, detach, refresh} from "electron-as-wallpaper";
+	 // or
+	 const {attach, detach, refresh} = require("electron-as-wallpaper");
+
+  const hWind = mainWindow.getNativeWindowHandle();
+
+  attach(hWind);
+  detach(hWind);
+
+  // if the window closed before detach, you can call refresh
+  refresh();
+	```
+---
+
+## The End (💘)

binding.gyp

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+{
+  'targets': [
+    {
+      'target_name': 'electron-as-wallpaper',
+      'sources': [ 'src/index.cpp' ],
+      'include_dirs': ["<!@(node -p \"require('node-addon-api').include\")"],
+      'dependencies': ["<!(node -p \"require('node-addon-api').gyp\")"],
+      'cflags!': [ '-fno-exceptions' ],
+      'cflags_cc!': [ '-fno-exceptions' ],
+      'xcode_settings': {
+        'GCC_ENABLE_CPP_EXCEPTIONS': 'YES',
+        'CLANG_CXX_LIBRARY': 'libc++',
+        'MACOSX_DEPLOYMENT_TARGET': '10.7'
+      },
+      'msvs_settings': {
+        'VCCLCompilerTool': { 'ExceptionHandling': 1 },
+      }
+    }
+  ]
+}

lib/src/index.ts

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+const bindings = require('bindings')('electron-as-wallpaper');
+
+/**
+ * set window behind desktop icons
+ **/
+export const attach: (hWind: Buffer) => true | null = (hWind: Buffer) => bindings.Attach(hWind);
+
+/**
+ * remove window from desktop icons
+ **/
+export const detach: (hWind: Buffer) => true | null = (hWind: Buffer) => bindings.Detach(hWind);
+
+/**
+ * refresh desktop
+ **/
+export const refresh = () => bindings.Refresh();
+
+export default {
+  attach, detach, refresh
+};

lib/types/index.d.ts

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+declare module 'module-name' {
+}

package.json

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+{
+  "name": "electron-as-wallpaper",
+  "version": "1.0.0",
+  "author": {
+    "name": "meslzy",
+    "email": "[email protected]",
+    "url": "https://www.meslzy.com/"
+  },
+  "description": "set your electron window as wallpaper behind desktop icons",
+  "keywords": [
+    "electron",
+    "wallpaper"
+  ],
+  "main": "dist/src/index.js",
+  "files": [
+    "dist",
+    "build"
+  ],
+  "scripts": {
+    "watch": "tsc --watch",
+    "configure": "node-gyp configure",
+    "build": "node-gyp build",
+    "clean": "node-gyp clean",
+    "install": "node-gyp rebuild"
+  },
+  "dependencies": {
+    "bindings": "^1.5.0",
+    "node-addon-api": "^4.2.0"
+  },
+  "devDependencies": {
+    "@types/node": "^16.10.2",
+    "typescript": "^4.4.3"
+  },
+  "gypfile": true,
+  "license": "ISC",
+  "directories": {
+    "lib": "lib"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/meslzy/electron-as-wallpaper.git"
+  },
+  "bugs": {
+    "url": "https://github.com/meslzy/electron-as-wallpaper/issues"
+  },
+  "homepage": "https://github.com/meslzy/electron-as-wallpaper#readme"
+}

src/index.cpp

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+#include <napi.h>
+#include <windows.h>
+
+using namespace Napi;
+
+Napi::Value Attach(const Napi::CallbackInfo &info) {
+    Napi::Env env = info.Env();
+
+    if (info.Length() != 1)
+    {
+        Napi::TypeError::New(env, "err msg 1").ThrowAsJavaScriptException();
+        return env.Null();
+    }
+
+    if (info[0].IsBuffer())
+    {
+        Napi::Buffer<void *> wndHandle = info[0].As<Napi::Buffer<void*>>();
+        HWND win = static_cast<HWND>(*reinterpret_cast<void **>(wndHandle.Data()));
+
+        HWND progmanHandle = FindWindow("Progman", nullptr);
+
+        SendMessage(progmanHandle, 0x052C, 0x0000000D, 0);
+        SendMessage(progmanHandle, 0x052C, 0x0000000D, 1);
+
+        static HWND workerW = nullptr;
+        EnumWindows([](HWND topHandle, LPARAM topParamHandle) {
+            HWND shellDllDefView = FindWindowEx(topHandle, nullptr, "SHELLDLL_DefView", nullptr);
+
+            if (shellDllDefView != nullptr) {
+                workerW = FindWindowEx(nullptr, topHandle, "WorkerW", nullptr);
+            }
+
+            return TRUE;
+        }, NULL);
+
+        if (workerW == NULL)
+        {
+            Napi::TypeError::New(env, "couldn't locate WorkerW").ThrowAsJavaScriptException();
+            return env.Null();
+        }
+
+        SetParent(win, workerW);
+
+        return Napi::Boolean::New(env, true);
+    }
+
+    Napi::TypeError::New(env, "err msg 2").ThrowAsJavaScriptException();
+    return env.Null();
+}
+
+Napi::Value Detach(const Napi::CallbackInfo &info) {
+    Napi::Env env = info.Env();
+
+    if (info.Length() != 1)
+    {
+        Napi::TypeError::New(env, "err msg 1").ThrowAsJavaScriptException();
+        return env.Null();
+    }
+
+    if (info[0].IsBuffer())
+    {
+        Napi::Buffer<void *> wndHandle = info[0].As<Napi::Buffer<void*>>();
+        HWND win = static_cast<HWND>(*reinterpret_cast<void **>(wndHandle.Data()));
+
+        SetParent(win, 0);
+
+        return Napi::Boolean::New(env, true);
+    }
+
+    Napi::TypeError::New(env, "err msg 2").ThrowAsJavaScriptException();
+    return env.Null();
+}
+
+Napi::Value Refresh(const Napi::CallbackInfo &info) {
+    Napi::Env env = info.Env();
+
+    SystemParametersInfo(20, 0, nullptr, 0x1);
+
+    return Napi::Boolean::New(env, true);
+}
+
+Napi::Object Init(Napi::Env env, Napi::Object exports) {
+    exports.Set(Napi::String::New(env, "Attach"), Napi::Function::New(env, Attach));
+    exports.Set(Napi::String::New(env, "Detach"), Napi::Function::New(env, Detach));
+    exports.Set(Napi::String::New(env, "Refresh"), Napi::Function::New(env, Refresh));
+    return exports;
+}
+
+NODE_API_MODULE(addon, Init);

tsconfig.json

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+{
+  "compilerOptions": {
+    "moduleResolution": "node",
+    "module": "commonjs",
+    "target": "es2017",
+    "rootDir": "lib",
+    "outDir": "dist",
+    "lib": [
+      "es2017",
+      "dom"
+    ],
+    "typeRoots": [
+      "node_modules/@types",
+      "lib/types"
+    ],
+    "declaration": true,
+    "inlineSourceMap": true,
+    "esModuleInterop": true,
+    "resolveJsonModule": true,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noImplicitReturns": true,
+    "noFallthroughCasesInSwitch": true,
+    "traceResolution": false,
+    "listEmittedFiles": false,
+    "listFiles": false,
+    "pretty": true,
+  },
+  "include": [
+    "lib/**/*.ts"
+  ],
+  "exclude": [
+    "node_modules/**"
+  ]
+}