This is the sixth 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 paint graphics on a Windows form using the form’s Paint event. This overcomes the problem of graphics being wiped away whenever a form is resized. .NET automatically creates a graphics object for use by a form and this is passed to the form’s paint event as a parameter, so it can be utilised by a programmer. This video also covers the use of horizontal scroll bars to input colour values and trigger the form’s paint event when these values are changed.