This document discusses building a PHP extension called Win32API that would allow PHP applications to access Windows API functions. It notes that desktop applications are still useful in some cases where websites have limitations. The Win32API extension would allow PHP to create desktop applications and access low-level Windows functions while avoiding some of PHP's disadvantages like speed. It reviews other existing PHP extensions for Windows and discusses design goals for the Win32API extension, which is aimed at providing full access to the Windows API in a thread-safe way across PHP versions and SAPIs.

1. Win32API extension for PHP Cool Windows Stuff for PHP