String or drawGrid

How Can I Change column type of a string/drawgrid. for example I Want The First Column Of my grid contain a CheckBox Type, The Second Contains ComboBox, etc. ?
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khalil_moghaddamAsked:
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Ferruccio AccalaiSenior developer, analyst and customer assistance Commented:
you cannot change a stringgrid column type but you can draw your controls in cells....
this example puts a buttom in tstringgrid cells...

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, Buttons, StdCtrls;

type
  TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    btn: TButton;
    procedure StringGrid1SelectCell(Sender: TObject; ACol, ARow: Integer;
      var CanSelect: Boolean);
    procedure btnClick(Sender: TObject);
    private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  col, Row: Integer;
implementation

{$R *.dfm}
procedure TForm1.StringGrid1SelectCell(Sender: TObject; ACol,
  ARow: Integer; var CanSelect: Boolean);
var
sel: TRect;
begin

      Sel := StringGrid1.CellRect(Acol, Arow);
      SetWindowPos(btn.Handle, { handle }
              0,
              (StringGrid1.Left + 1) + ((Sel.Right )- (sel.Bottom-sel.Top)),
              Sel.Top + StringGrid1.top + 2,
              (sel.Bottom-sel.Top),
              Sel.Bottom - Sel.top ,
              SWP_NOZORDER or SWP_SHOWWINDOW);
      col := ACol;
      Row := ARow;
      btn.Show;
   
end;

procedure TForm1.btnClick(Sender: TObject);
begin
 SHowMessage('Selected Row '+IntToSTr(Row)+ ' in Column '+IntToSTr(Col));
end;

end.

F68 ;)

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