Windart is a Windows API (Win32) binding library for Dart, powered by dart:ffi.
It gives you direct access to User32, Kernel32, and Gdi32 functions — without writing C or C++ code.

Think of it as Dart’s gateway to the Win32 API 🎉

• Full access to common Windows APIs:
  • User32.dll → windows, events, input, message boxes
  • Kernel32.dll → processes, files, console, environment
  • Gdi32.dll → drawing, bitmaps, pens, brushes, regions
• Typed FFI structs for RECT, MSG, PAINTSTRUCT, POINT, etc.
• Dart-friendly wrappers around C functions
• Constants for window messages, key codes, file access, system metrics and more
• 100% pure Dart — no extra DLLs needed, just Windows itself

Add the dependency in your pubspec.yaml:

dependencies:
  windart: any

Then run:

dart pub get

import 'package:windart/windart.dart';
import 'package:ffi/ffi.dart';

void main() {
  User32.messageBoxW(
    0,
    "Hello from Dart!".toNativeUtf16(),
    "Windart Demo".toNativeUtf16(),
    MB_OK | MB_ICONINFORMATION,
  );
}

import 'package:windart/windart.dart';
import 'package:ffi/ffi.dart';
import 'dart:ffi';

void main() {
  Kernel32.allocConsole();
  final hConsole = Kernel32.getStdHandle(STD_OUTPUT_HANDLE);

  final text = "Hello, Windows console 👋".toNativeUtf16();
  final written = calloc<Uint32>();

  Kernel32.writeConsoleW(hConsole, text, text.length, written, nullptr);

  calloc.free(text);
  calloc.free(written);
}

import 'package:windart/windart.dart';
import 'dart:ffi';

void main() {
  final hdc = Gdi32.getDC(0);

  final pen = Gdi32.createPen(0, 3, 0x00FF0000); // red
  final old = Gdi32.selectObject(hdc, pen);

  Gdi32.rectangle(hdc, 100, 100, 400, 300);

  Gdi32.selectObject(hdc, old);
  Gdi32.deleteObject(pen);
  Gdi32.releaseDC(0, hdc);
}

• Win32 API docs (Microsoft)
• dart:ffi guide

• More APIs: Advapi32, Shell32, Comctl32
• Higher-level Dart helpers (e.g. GUI widgets, GDI helpers)

Contributions are welcome!
If you’d like to add bindings or improve wrappers, feel free to open a PR or file an issue.

MIT License – see LICENSE

This package provides low-level access to Windows internals.
⚡ Be careful: calling APIs with invalid arguments can crash your app.