Как поместить данные в TRichEdit-контролл?

unit dbrich; 
interface 
 
uses 
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, 
  StdCtrls, ComCtrls, DB, DBTables, Menus, ExtCtrls, Mask, Buttons, DBCtrls; 
 
//Замечание: вызывать Tablex.Edit необходимо перед изменением свойства paragraph
 
type 
  TDBRichEdit = class(TRichEdit) 
  private 
    FDataLink: TFieldDataLink; 
    FAutoDisplay: Boolean; 
    FFocused: Boolean; 
    FMemoLoaded: Boolean; 
    FPaintControl: TPaintControl; 
    procedure DataChange(Sender: TObject); 
    procedure EditingChange(Sender: TObject); 
    function  GetDataField: string; 
    function  GetDataSource: TDataSource; 
    function  GetField: TField; 
    function  GetReadOnly: Boolean; 
    procedure SetDataField(const Value: string); 
    procedure SetDataSource(Value: TDataSource); 
    procedure SetReadOnly(Value: Boolean); 
    procedure SetAutoDisplay(Value: Boolean); 
    procedure SetFocused(Value: Boolean); 
    procedure UpdateData(Sender: TObject); 
    procedure WMCut(var Message: TMessage); message WM_CUT; 
    procedure WMPaste(var Message: TMessage); message WM_PASTE; 
    procedure CMEnter(var Message: TCMEnter); message CM_ENTER; 
    procedure CMExit(var Message: TCMExit); message CM_EXIT; 
    procedure WMLButtonDblClk(var Message: TWMLButtonDblClk); 
      message WM_LBUTTONDBLCLK; 
    procedure WMPaint(var Message: TWMPaint); message WM_PAINT; 
    procedure CMGetDataLink(var Message: TMessage); message CM_GETDATALINK; 
  protected 
    procedure Change; override; 
    procedure KeyDown(var Key: Word; Shift: TShiftState); override; 
    procedure KeyPress(var Key: Char); override; 
    procedure Notification(AComponent: TComponent; 
      Operation: TOperation); override; 
    procedure WndProc(var Message: TMessage); override; 
  public 
    constructor Create(AOwner: TComponent); override; 
    destructor Destroy; override; 
    procedure  LoadMemo; 
    property   Field: TField read GetField; 
  published 
    property AutoDisplay: Boolean read FAutoDisplay write SetAutoDisplay 
      default True; 
    property DataField: string read GetDataField write SetDataField; 
    property DataSource: TDataSource read GetDataSource write SetDataSource; 
    property ReadOnly: Boolean read GetReadOnly write SetReadOnly 
      default False; 
  end; 
 
procedure Register; 
 
implementation 
 
procedure Register; 
begin 
  RegisterComponents('Data Controls', [TDBRichEdit]); 
end; 
 
{Mostly copied from DBMemo} 
 
constructor TDBRichEdit.Create(AOwner: TComponent); 
begin 
  inherited Create(AOwner); 
  inherited ReadOnly := True; 
  FAutoDisplay := True; 
  FDataLink := TFieldDataLink.Create; 
  FDataLink.Control := Self; 
  FDataLink.OnDataChange := DataChange; 
  FDataLink.OnEditingChange := EditingChange; 
  FDataLink.OnUpdateData := UpdateData; 
  FPaintControl := TPaintControl.Create(Self, 'EDIT'); 
end; 
 
destructor TDBRichEdit.Destroy; 
begin 
  FPaintControl.Free; 
  FDataLink.Free; 
  FDataLink := nil; 
  inherited Destroy; 
end; 
 
procedure TDBRichEdit.Notification(AComponent: TComponent; 
  Operation: TOperation); 
begin 
  inherited Notification(AComponent, Operation); 
  if (Operation = opRemove) and (FDataLink <> nil) and 
    (AComponent = DataSource) then DataSource := nil; 
end; 
 
procedure TDBRichEdit.KeyDown(var Key: Word; Shift: TShiftState); 
begin 
  inherited KeyDown(Key, Shift); 
  if FMemoLoaded then 
  begin 
    if (Key = VK_DELETE) or ((Key = VK_INSERT) and (ssShift in Shift)) then 
      FDataLink.Edit; 
  end else 
    Key := 0; 
end; 
 
procedure TDBRichEdit.KeyPress(var Key: Char); 
begin 
  inherited KeyPress(Key); 
  if FMemoLoaded then 
  begin 
    if (Key in [#32..#255]) and (FDataLink.Field <> nil) and 
      not FDataLink.Field.IsValidChar(Key) then 
    begin 
      MessageBeep(0); 
      Key := #0; 
    end; 
    case Key of 
      ^H, ^I, ^J, ^M, ^V, ^X, #32..#255: 
        FDataLink.Edit; 
      #27: 
        FDataLink.Reset; 
    end; 
  end else 
  begin 
    if Key = #13 then LoadMemo; 
    Key := #0; 
  end; 
end; 
 
procedure TDBRichEdit.Change; 
begin 
  with FdataLink do 
  begin 
    {if Assigned(FdataLink) and (Assigned(DataSource))and 
     (DataSource.State = dsBrowse) then 
      Edit; } {make sure edits on Attributes change} 
    if FMemoLoaded then Modified; 
  end; 
  FMemoLoaded := True; 
  inherited Change; 
end; 
 
function TDBRichEdit.GetDataSource: TDataSource; 
begin 
  Result := FDataLink.DataSource; 
end; 
 
procedure TDBRichEdit.SetDataSource(Value: TDataSource); 
begin 
  FDataLink.DataSource := Value; 
  if Value <> nil then Value.FreeNotification(Self); 
end; 
 
function TDBRichEdit.GetDataField: string; 
begin 
  Result := FDataLink.FieldName; 
end; 
 
procedure TDBRichEdit.SetDataField(const Value: string); 
begin 
  FDataLink.FieldName := Value; 
end; 
 
function TDBRichEdit.GetReadOnly: Boolean; 
begin 
  Result := FDataLink.ReadOnly; 
end;

Взято из https://forum.sources.ru