The open-source operating system ReactOS has recently completed a critical underlying update, officially integrating the DirectX technology stack based on Wine 10.0. This update marks a significant breakthrough for ReactOS in terms of compatibility with Windows applications and games. Through reverse engineering and reimplementation techniques, a native DirectX support module has been constructed on its self-developed kernel. Currently, the focus is on implementing Direct3D 9 and related components, enabling the system to run classic 3D games such as Half-Life 2, while also supporting WAV format audio playback and basic sound mixing functions. The update adopts a modular design, optimizing rendering efficiency through techniques such as state caching, video memory pool management, and multithreading synchronization. Additionally, a universal VESA display driver has been introduced as a transitional solution. The project team is now advancing subsequent development efforts, including DXGI migration, Shader Model 5.0 expansion, and DirectComposition integration.