How to make sure GC allocated resources stay around when used in C functions?

[Gary Willoughby via Digitalmars-d-learn]

On Monday, 12 May 2014 at 20:03:46 UTC, Kagamin wrote:
> Why many? I'd say, you typically have 0 subscriptions (label, 
> textbox) per widget, seldom - 1 (button, combobox, checkbox).

There are many events that can be bound to on any widget.
https://github.com/nomad-software/tkd/blob/master/source/tkd/element/uielement.d#L328