Implementing Software Design Pattern in Winforms C++/CLI

I am building a small application which is a library management system on Windows Forms using C++/CLI. I need to implement a Design Pattern to make it more portable and readable.

I have searched on the internet but everywhere with Windows Forms developers have used C#. I am not allowed to use C# and I also do not know how to code in C#. So is there any code reference for design patterns in Windows Forms C++/CLI or should I shift to other GUI libraries like QT or WxWidgets?