diff --git a/electron/package-lock.json b/electron/package-lock.json
index 2147494ba115c556946edd44565dea6aee489195..0187ca41a91b774afca6837d80abcf3dc8e6339b 100644
--- a/electron/package-lock.json
+++ b/electron/package-lock.json
@@ -9,7 +9,19 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
-        "ffi-napi": "^4.0.3"
+        "ffi-napi": "^4.0.3",
+        "win32-api": "^20.4.1"
+      }
+    },
+    "node_modules/@waiting/shared-types": {
+      "version": "20.13.0",
+      "resolved": "https://registry.npmmirror.com/@waiting/shared-types/-/shared-types-20.13.0.tgz",
+      "integrity": "sha512-OiMocNStZbtkf8LEwrbtAuiI3WtwXo+Aoqhz6jP6i9KSogNDsEMccJRz5wq+gVeO2qEcymn5J2NyK7vR/icgBg==",
+      "engines": {
+        "node": ">=14.16.0"
+      },
+      "peerDependencies": {
+        "typescript": ">=4.7.4"
       }
     },
     "node_modules/debug": {
@@ -108,9 +120,79 @@
       "dependencies": {
         "ms": "^2.1.1"
       }
+    },
+    "node_modules/ref-union-di": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmmirror.com/ref-union-di/-/ref-union-di-1.0.1.tgz",
+      "integrity": "sha512-JWSF2BwNVtCgmEfoDGMh8S1KO07oq+T8L7cBHwcsmQmeXDZd9JNlrxU+ebSHs+jsf0qrqFFWXMCmj94Tcl26TA==",
+      "peer": true,
+      "dependencies": {
+        "debug": "^3.1.0"
+      }
+    },
+    "node_modules/ref-union-di/node_modules/debug": {
+      "version": "3.2.7",
+      "resolved": "https://registry.npmmirror.com/debug/-/debug-3.2.7.tgz",
+      "integrity": "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==",
+      "peer": true,
+      "dependencies": {
+        "ms": "^2.1.1"
+      }
+    },
+    "node_modules/typescript": {
+      "version": "5.2.2",
+      "resolved": "https://registry.npmmirror.com/typescript/-/typescript-5.2.2.tgz",
+      "integrity": "sha512-mI4WrpHsbCIcwT9cF4FZvr80QUeKvsUsUvKDoR+X/7XHQH98xYD8YHZg7ANtz2GtZt/CBq2QJ0thkGJMHfqc1w==",
+      "peer": true,
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
+    "node_modules/win32-api": {
+      "version": "20.4.1",
+      "resolved": "https://registry.npmmirror.com/win32-api/-/win32-api-20.4.1.tgz",
+      "integrity": "sha512-STbeoFsVndgc5eMmXcvmuuoWM2S8mOh/0V2w/gmYAFSI+FPoYDjGhvntrvhvoFMec8AC2ReI2LSkb8KGyEqhPQ==",
+      "dependencies": {
+        "win32-def": "^20.4.1"
+      },
+      "engines": {
+        "node": ">=14.15.0"
+      },
+      "peerDependencies": {
+        "ffi-napi": "^4.0.3",
+        "ref-napi": "^3.0.3",
+        "ref-struct-di": "^1.1.1",
+        "ref-union-di": "^1.0.1"
+      }
+    },
+    "node_modules/win32-def": {
+      "version": "20.4.1",
+      "resolved": "https://registry.npmmirror.com/win32-def/-/win32-def-20.4.1.tgz",
+      "integrity": "sha512-d2y6pN/ebLU4Vsu4JepzeEtdWTVcAkJIiAFZiPjT/mjac2YYvhM4jM2bGKdt8usJNxAI2o7YiF0ytdVDQO6Qdg==",
+      "dependencies": {
+        "@waiting/shared-types": "^20.11.0"
+      },
+      "engines": {
+        "node": ">=14.15.0"
+      },
+      "peerDependencies": {
+        "ref-napi": "^3.0.3",
+        "ref-struct-di": "^1.1.1",
+        "ref-union-di": "^1.0.1"
+      }
     }
   },
   "dependencies": {
+    "@waiting/shared-types": {
+      "version": "20.13.0",
+      "resolved": "https://registry.npmmirror.com/@waiting/shared-types/-/shared-types-20.13.0.tgz",
+      "integrity": "sha512-OiMocNStZbtkf8LEwrbtAuiI3WtwXo+Aoqhz6jP6i9KSogNDsEMccJRz5wq+gVeO2qEcymn5J2NyK7vR/icgBg==",
+      "requires": {}
+    },
     "debug": {
       "version": "4.3.4",
       "resolved": "https://registry.npmmirror.com/debug/-/debug-4.3.4.tgz",
@@ -188,6 +270,48 @@
           }
         }
       }
+    },
+    "ref-union-di": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmmirror.com/ref-union-di/-/ref-union-di-1.0.1.tgz",
+      "integrity": "sha512-JWSF2BwNVtCgmEfoDGMh8S1KO07oq+T8L7cBHwcsmQmeXDZd9JNlrxU+ebSHs+jsf0qrqFFWXMCmj94Tcl26TA==",
+      "peer": true,
+      "requires": {
+        "debug": "^3.1.0"
+      },
+      "dependencies": {
+        "debug": {
+          "version": "3.2.7",
+          "resolved": "https://registry.npmmirror.com/debug/-/debug-3.2.7.tgz",
+          "integrity": "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==",
+          "peer": true,
+          "requires": {
+            "ms": "^2.1.1"
+          }
+        }
+      }
+    },
+    "typescript": {
+      "version": "5.2.2",
+      "resolved": "https://registry.npmmirror.com/typescript/-/typescript-5.2.2.tgz",
+      "integrity": "sha512-mI4WrpHsbCIcwT9cF4FZvr80QUeKvsUsUvKDoR+X/7XHQH98xYD8YHZg7ANtz2GtZt/CBq2QJ0thkGJMHfqc1w==",
+      "peer": true
+    },
+    "win32-api": {
+      "version": "20.4.1",
+      "resolved": "https://registry.npmmirror.com/win32-api/-/win32-api-20.4.1.tgz",
+      "integrity": "sha512-STbeoFsVndgc5eMmXcvmuuoWM2S8mOh/0V2w/gmYAFSI+FPoYDjGhvntrvhvoFMec8AC2ReI2LSkb8KGyEqhPQ==",
+      "requires": {
+        "win32-def": "^20.4.1"
+      }
+    },
+    "win32-def": {
+      "version": "20.4.1",
+      "resolved": "https://registry.npmmirror.com/win32-def/-/win32-def-20.4.1.tgz",
+      "integrity": "sha512-d2y6pN/ebLU4Vsu4JepzeEtdWTVcAkJIiAFZiPjT/mjac2YYvhM4jM2bGKdt8usJNxAI2o7YiF0ytdVDQO6Qdg==",
+      "requires": {
+        "@waiting/shared-types": "^20.11.0"
+      }
     }
   }
 }
diff --git a/electron/package.json b/electron/package.json
index 3129717c3d933034b650f5f71c44c2c26301f2ab..177e7bb00d7f1348fca88504f6e0285c4303afd9 100644
--- a/electron/package.json
+++ b/electron/package.json
@@ -3,15 +3,18 @@
   "version": "1.0.0",
   "description": "todo",
   "main": "index.js",
+  "type": "module",
   "directories": {
     "doc": "doc"
   },
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "foo2": "node win32-api.js"
   },
   "author": "khz",
   "license": "ISC",
   "dependencies": {
-    "ffi-napi": "^4.0.3"
+    "ffi-napi": "^4.0.3",
+    "win32-api": "^20.4.1"
   }
 }
diff --git a/electron/win32-api.js b/electron/win32-api.js
new file mode 100644
index 0000000000000000000000000000000000000000..7420fcd6e333dab296887ad32aed7effb6a7792c
--- /dev/null
+++ b/electron/win32-api.js
@@ -0,0 +1,36 @@
+// https://github.com/waitingsong/node-win32-api/blob/main/README.zh-CN.md
+// **查询计算器程序窗口句柄（需要先手动运行一个计算器）**
+
+/**
+ * 导出的模块:
+ * Comctl32: Comctl32 from lib/comctl32/api
+ * Kernel32: kernel32 from lib/kernel32/api
+ * User32: user32 from lib/user32/api
+ */
+import { Kernel32, User32 } from 'win32-api/promise'
+import ref from 'ref-napi'
+
+const knl32 = Kernel32.load()
+const user32 = User32.load()
+// user32.MessageBoxW("0","0",0,0)
+
+// const user32 = load(['FindWindowExW'])  // load only one api defined in lib/{dll}/api from user32.dll
+
+// const title = 'Calculator\0'    // null-terminated string
+ const title = '计算器\0'    // null-terminated string 字符串必须以\0即null结尾!
+
+const lpszWindow = Buffer.from(title, 'ucs2')
+const hWnd = await user32.FindWindowExW(0, 0, null, lpszWindow)
+
+// assert((typeof hWnd === 'string' && hWnd.length > 0) || hWnd > 0)
+console.log('buf: ', hWnd)
+user32.CloseWindow(hWnd)
+
+// // Change title of the Calculator
+// const res = await user32.SetWindowTextW(hWnd, Buffer.from('Node-Calculator\0', 'ucs2'))
+// if ( ! res) {
+//   console.log('SetWindowTextW failed')
+// }
+// else {
+//   console.log('window title changed')
+// }
\ No newline at end of file