This session aims to guide participants through the process of transitioning two-dimensional (2D) applications into the spatial computing landscape. Learn how to apply existing skills to deploy 2D apps on augmented reality (AR) and spatial app stores. The focus will be on integrating mixed reality elements into programming tools on Windows, specifically using the Quest 3. Practical insights will be provided on the challenges and considerations associated with VR/MR/Spatial tools in programming contexts, offering a realistic overview of the potential for flat applications on emerging platforms.