[Lazarus] Enter information or select one from a list

[Arí Ricardo Ody]

I want to create a component on a form that allows me to select an item
from a list of component items or type a new item.
The idea is to store items that have been typed in previous executions at
Form OnActivate time and then, when the focus reaches the component, I
would like to display the components from the stored list and select one of
them. Or, alternatively, if the stored list does not contain the text I
need, type it into the component. Then, if you enter a new value, it will
go to the already stored list, which at the end of the process will be
rewritten with the new component included.
In short, a component that allows me to either select from a previously fed
list or enter a new value in the component analogously to what I would do,
for example, in a TEdit component.
I apologize if the question is very elementary, but I couldn't find
material that would help me. I thought maybe about the TComboBox component,
but I couldn't evaluate whether it allows me to manually feed a new value
if I need to. And later include this new value in the list to be displayed
in future processing.

Cheers

Arí Ricardo
São Paulo - Brazil
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