Code:

{

To color text in a TRichEdit, follow this two steps:

1) Select the text with the SelStart, SelLength properties.

2) Set the text attribtutes through the SelAttributes property.

}

{

1. Example/ Beispiel:

Add a colored line to a TRichEdit:

}

procedure AddColoredLine(ARichEdit: TRichEdit; AText: string; AColor: TColor);

begin

  with ARichEdit do

  begin

    SelStart := Length(Text);

    SelAttributes.Color := AColor;

    SelAttributes.Size := 8;

    SelAttributes.Name := 'MS Sans Serif';

    Lines.Add(AText);

  end;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

  AddColoredLine(RichEdit1, 'Hallo', clRed);

  AddColoredLine(RichEdit1, 'Hallo', clGreen);

end;

{

2. Example/ Beispiel:

To color the 5 characters.

Die ersten 5 Zeichen im Richedit blau einfдrben.

}

procedure TForm1.Button1Click(Sender: TObject);

begin

  RichEdit1.SelStart  := 0;

  RichEdit1.SelLength := 5;

  RichEdit1.SelAttributes.Color := clBlue;

end;

{

3. Example/ Beispiel: ( by www.delphimania.de)

To color a specified line with a color

So kann eine beliebige Zeile mit einer Farbe gefдrbt werden:

}

procedure RE_ColorLine(ARichEdit: TRichEdit; ARow: Integer; AColor: TColor);

begin

  with ARichEdit do

  begin

    SelStart := SendMessage(Handle, EM_LINEINDEX, ARow - 1, 0);

    SelLength := Length(Lines[ARow - 1]);

    SelAttributes.Color := AColor;

    SelLength := 0;

  end;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

  ZeileFaerben(RichEdit1, 4, clGreen);

end;