Returns current value's index to the choice control. May also return, through pointer arguments, strings that should be inserted to that control. Irrelevant to classes which do not employ wxPG_EDITOR(Choice) or similar.
Reimplemented in wxEnumProperty, wxFlagsProperty, and wxCustomProperty.
Referenced by wxPGProperty::DeleteChoice(), wxPropertyGridInterface::GetPropertyChoices(), wxPGProperty::InsertChoice(), wxPGProperty::SetChoices(), and wxPGProperty::SetChoicesExclusive().