Configure wxComboBox's drop-down list

Is it possible to configure the drop-down list of a ComboBox ?

For example, if there are many choices in the list and the ComboBox is near
the top of the screen, then a very tall drop-down list is displayed. Would it
be possible set a maximum height for the list?

Initially this would be on *nix/Gtk, but preferably it should work on windows
also.

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Richard Townsend