Called before a text in a cell is being rendered. It provides an opportunity to change font color and style.

property OnStyleText: TNxStyleTextEvent read FOnStyleTextEvent write FOnStyleTextEvent;

Example

procedure TForm1.NxMemoColumn62StyleText(Sender: TObject; ACol, ARow: Integer; var FontColor: TColor;
  FillColor: TColor; var FontStyle: TFontStyles; CellValue: INxBase; CellState: TNxCellPaintingState);
begin
  if ARow = FErrorIndex then
  begin
    FontColor := clRed;
    FontStyle := [fsBold];
  end;
end;