delphi : how can I change color of a cell in string grid

Question

I want to change background color ( not font ) of a cell in string grid in delphi .

Just one cell not a row or a column.

Can I?

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RRUZ : your procedure is correct and works but in my procedure doesn't work.

My procedure:

x is a global array of integer

procedure TF_avalie_salon.StringGrid1DrawCell(Sender: TObject; ACol,
    ARow: Integer; Rect: TRect; State: TGridDrawState);
    var   S: string;
begin
    S := StringGrid1.Cells[ACol, ARow];
    StringGrid1.Canvas.FillRect(Rect);
    SetTextAlign(StringGrid1.Canvas.Handle, TA_CENTER);
    StringGrid1.Canvas.TextRect(Rect,Rect.Left + (Rect.Right - Rect.Left) div 2, Rect.Top + 2, S);
    if (ARow<>0 )AND(acol<>0)AND(gridclick=true) then
    begin
        try
          gridclick:=false;
          x[acol+((strtoint(Edit_hafte.Text)-1)*7),arow]:=strtoint(StringGrid1.Cells[ACol, ARow]);
        except
          x[acol+((strtoint(Edit_hafte.Text)-1)*7),arow]:=0;
          StringGrid1.Cells[acol,arow]:='0';
          with TStringGrid(Sender) do
          begin
            Canvas.Brush.Color := clGreen;
            Canvas.FillRect(Rect);
            Canvas.TextOut(Rect.Left+2,Rect.Top+2,Cells[ACol, ARow]);
          end;
        end;
    end;
end;

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When I use Canvas.Brush.Color with below code , Canvas.Brush.Color doesn't work. If I inactive below code I can change the cells color. But I need both.

    S := StringGrid1.Cells[ACol, ARow];
    StringGrid1.Canvas.FillRect(Rect);
    SetTextAlign(StringGrid1.Canvas.Handle, TA_CENTER);
    StringGrid1.Canvas.TextRect(Rect,Rect.Left + (Rect.Right - Rect.Left) div 2, Rect.Top + 2, S);

Answer 1

The Rafael link contains all which you need, using the OnDrawCell event is the way to paint the cells of a StrignGrid. check this sample which paint only the background of an specific cell.

procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;  Rect: TRect; State: TGridDrawState);
begin
  if (ACol = 3) and (ARow = 2) then
    with TStringGrid(Sender) do
    begin
      //paint the background Green
      Canvas.Brush.Color := clGreen;
      Canvas.FillRect(Rect);
      Canvas.TextOut(Rect.Left+2,Rect.Top+2,Cells[ACol, ARow]);
    end;
end;