Here it is: https://gtkdcoding.com/2019/07/16/0053-mvc-vi-image-combobox.html
Blog Post #0053: MVC VI - ComboBox with Pixbufs
Ron Tarrant via Digitalmars-d-learn Tue, 16 Jul 2019 03:11:28 -0700
Carrying on with installment #6 of the MVC series, we see how to
use images in a ComboBox. This is the last bit of peripheral
stuff we'll need to know before tackling the TreeView and (later)
the TreeStore.