Impelement a custom combobox with a custom search in VB.NET, 7.0 framework -- 2

I wish to implement a Custom Combobox, such that as the user types in text in the Custom Combobox, the Custom Combobox will search through the internal items and display the custom search results in a dropdown menu. This control should work by itself, and should also be able to work in a datagridview. It should look, act, and work exactly like a regular combobox and like a regular datagridview, except that the search function is replaced by the code in the attached document.

https://www.codeproject.com/Tips/755707/ComboBox-with-Suggestions-Based-on-Loose-Character

Attached is the full requirements.

VB.NET, Windows Form project, using .NET 7.0 framework