GetDisplayTextThis method is called when Column need to render output text. Raw Cell's value is usually formatted inside this method by using Column specific properties (FormatMask, TextAfter etc.), and then is displayed.
function GetDisplayText(Cell: INxBase; ACol, ARow: Integer): WideString; virtual;
Almost every column who need to display text overrides this method.
DisplayText property of Cell is directly connected to this method.