Robot programming is a well-known and time-consuming task.\enspace Various methods have been developed over the years to simplify this process. However, most of these methods focus on a singular device for programming. This thesis applies the concept of Hybrid User Interfaces (HUI) to skill-based robot programming and tests the potential advantage of combining multiple devices to form a user interface. The developed system consists of a Head Mounted Display (HMD), a desktop application, and a smartphone application. It allows the creation and parameterization of skills to form applications, the definition of 3D positions, the simulation with a virtual robot, and the execution on a real robot. An exploratory user study was conducted to show the benefits of such HUIs for online robot programming for assembly tasks. The results show that users mostly prefer the traditional desktop interface to create the main program flow. However, the HMD and smartphone applications were still used for specific sub-tasks, like creating new positions in the 3D space, visualization of a virtual robot, or finetuning parameter values. Based on the results gathered, research questions for future research were formulated.