OnColumnClick из TListView для TStringGrid

{ 
 There are two routines to implement the OnColumnClick Methods for a TStringGrid. 
 Set the first row as fixed and the Defaultdrawing to True. 
}

type
  TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    procedure StringGrid1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure StringGrid1MouseUp(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
  private
    zelle: TRect; // cell 
    acol, arow: Integer;
  public
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.StringGrid1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
var
  Text: string;
begin
  with stringgrid1 do
  begin
    MouseRoCell(x, y, acol, arow);
    if (arow = 0) and (button = mbleft) then
      case acol of
        0..2:
          begin
            // Draws a 3D Effect (Push) 
            // Zeichnet 3D-Effekt (Push) 
            zelle := CellRect(acol, arow);
            Text := Cells[acol, arow];
            Canvas.Font := Font;
            Canvas.Brush.Color := clBtnFace;
            Canvas.FillRect(zelle);
            Canvas.TextRect(zelle, zelle.Left + 2, zelle.Top + 2, Text);
            DrawEdge(Canvas.Handle, zelle, 10, 2 or 4 or 8);
            DrawEdge(Canvas.Handle, zelle, 2 or 4, 1);
          end;
      end;
  end;
end;

procedure TForm1.StringGrid1MouseUp(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
var
  Text: string;
begin
  with StringGrid1 do
  begin
    // Draws a 3D-Effect (Up) 
    // Zeichnet 3D-Effekt (Up) 
    Text := Cells[acol, arow];
    if arow = 0 then
    begin
      Canvas.Font := Font;
      Canvas.Brush.Color := clBtnFace;
      Canvas.FillRect(zelle);
      Canvas.TextRect(zelle, zelle.Left + 2, zelle.Top + 2, Text);
      DrawEdge(Canvas.Handle, zelle, 4, 4 or 8);
      DrawEdge(Canvas.Handle, zelle, 4, 1 or 2);
      MouseToCell(zelle.Left, zelle.Top, acol, arow);
    end;
  end;
  if (arow = 0) and (Button = mbleft) then
    case acol of
      0..2:
        begin
          // Code to be executed... 
          // Programmcode der ausgefuhrt werden soll 
          ShowMessage('Column ' + IntToStr(acol));
          zelle := stringgrid1.CellRect(1, 1);
        end;
    end;
end;

end.