This is the fifth in a series of videos about how to build an RGB colour mixer using Visual Basic.NET. This series covers the use of the VB.NET graphics object, along with a range of related objects and their methods for drawing and filling shapes on a Windows Form. This particular video includes step by step instructions on how to capture user input to modify the saturation of each primary colour. For now, the input is captured via simple text boxes on the form, but this brings the application closer to the finished product.