StdCtrls.TCustomListBox.OnData
From RAD Studio VCL Reference
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Delphi Information
From StdCtrls.pas
property OnData: TLBGetDataEvent read FOnData write FOnData;
Unit: StdCtrls
Type: event
Visibility: protected
Member Of: TCustomListBox
C++ Information
From StdCtrls.hpp
__property TLBGetDataEvent OnData;
Unit: StdCtrls
Type: property
Visibility: protected
Member Of: TCustomListBox
Description
Occurs when a virtual list box needs to supply the text of an item.
You must supply an OnData event handler to dynamically supply the items in the list box when the Style property is lbVirtual or lbVirtualOwnerDraw.