Windows Registry

A small registry API on advapi32.dll: read and write string and DWORD values, open and delete keys. Failures are raised by an errcheck on the LSTATUS results.

Platform: Windows · Library: registry.js · Used by: ../tray/tray.js (dark mode detection)

Run

node examples/windows/registry/demo_registry.js
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The demo writes and then deletes HKEY_CURRENT_USER\Software\node_ctypes_demo.

Use the library

import { Registry, HKEY } from "./registry.js";

Registry.setValue(HKEY.CURRENT_USER, "Software\\myapp", "Name", "Hello");
console.log(Registry.getValue(HKEY.CURRENT_USER, "Software\\myapp", "Name")); // "Hello"

const key = Registry.openKey(HKEY.CURRENT_USER, "Software\\myapp", { write: true });
key.setDword("Count", 123);
console.log(key.getDword("Count")); // 123
key.close();
Registry.deleteKey(HKEY.CURRENT_USER, "Software\\myapp");
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node-ctypes features used

wintypes pointer types (LPDWORD, PHKEY, LPBYTE = POINTER(T)) · DWORD() / HKEY() instances with byref() and .value, as in Python · cast(buffer, LPBYTE) · errcheck · create_unicode_buffer().value