The Windows programming interface combines traditional Win32 APIs, COM interfaces and more modern Windows Runtime libraries. As all these provide a C-based ABI, you can call into the services provided by the operating system using Dart's Foreign Function Interface library (dart:ffi). FFI is designed to enable Dart programs to efficiently call into C libraries. It provides Flutter apps with the ability to allocate native memory with malloc or calloc, support for pointers, structs and callbacks, and ABI types like long and size_t.