Hannes DuPreez

When I was teaching programming full time, I always tried to enable the students to think for themselves, and figure out how their own logic works, because it is quite difficult teaching people logic. With the introduction to programming exam (which was mostly theoretical), I included a scenario about a programmable mouse that needs to […]

Introduction You never know when you may need something. This is the lesson I have learned recently. I am not talking about physical things. I mean, everyone needs money, but this is not what I am talking about. I am talking about a small thing we can take for granted. Eyesight. Due to an injury, […]

Introduction Hello and welcome to the third and final installment of this article series. So far, we have done a lot of work by building the shapes, the logic to resize them, the properties of the various shapes, and the lines measuring the distance between the shapes whilst moving them around. This installment will bring […]

Introduction Welcome to the final installment of my Xamarin article series. I think you’ll agree that we have covered a lot during the past few months, and I hope that this series has helped you in some way. The last thing I’d like to talk about is PCLs (Portable Class Libraries), and today you will […]

Introduction In the first installment of this article series, “Creating a Shape Editor in .NET,” we created the framework for our drawing application. With this installment, you will create the canvas to draw on and create the shapes. The functionality already exists for the shapes to be resized and dragged about. There is a tonne […]

It seems as if the BitCoin fad has eased up a bit, especially after these types of currencies suffered some serious blows. Be that as it may, the BlockChain is still a very interesting technology, and it won’t die soon. In my previous article, “Introduction to Blockchain Programming,” I explained how to get started with […]

Introduction Drawing applications have always had a soft place in my heart. In the past, I have written a lot about drawing and creating funky stuff with shapes and the .NET Framework’s System.Drawing namespace. Today is not much different. Today, you will learn how to create an editable shape. This shape will be able to […]

Introduction Part 4 in my Xamarin series of articles explains Shared Projects and the benefits of sharing code. You have come a long way so far within the Xamarin series. We have covered the basics and the installation of Xamarin, as well as Layouts in Xamarin. Shared Projects Shared Projects enables you to write common […]

Binary Gap A binary gap is any sequence of consecutive zeros that is surrounded by ones at both ends in the binary representation of the number. For example, the number 25 has binary representation 11001 and contains a binary gap of 2. The number 723 has binary representation 1011010011 and contains three binary gaps: two […]

Introduction I love graphics and effects, and I love writing about them. Today is no exception. In this article, you will see how easy it is to create a Fade in and Fade out effect with images. It is not a whole lot of work, but quite fun, I promise. Start Visual Studio and create […]

Introduction Every now and then, we must do something through code that could have been done without code. This may sound strange, but having a project at the ready can save you time. In the example today, we are going to create a project that interrogates the Registry for the presence of the .NET Framework, […]

Introduction Welcome to the second installment of this short series on creating your own color picker in .NET. In Part 1, “Creating a Custom Color Picker in .NET, Part 1: The Color Wells,” we concentrated on creating the color wells. It was a lot of work… What we will do today is to bring it […]