If I've right you understood, do you find our Annotation Demo project too complicated?
If so, after installation of the evaluation setup package there are also much more simple demo available:
Open "[install_path]\Examples\CSharp\SimpleDemos" folder for getting C# source codes for WinForms application for Visual Studio .NET 2005 - 2017
Open "[install_path]\Examples\VB.NET\SimpleDemos" folder for getting VB.NET source codes for WinForms application for Visual Studio .NET 2005 - 2017
Open "[install_path]\Examples\CSharp\WpfSimpleDemos" folder for getting C# source codes for WPF application for Visual Studio .NET 2008 - 2017
Open "[install_path]\Examples\VB.NET\WpfSimpleDemos" folder for getting VB.NET source codes for WPF application for Visual Studio .NET 2008 - 2017