Поиск в StringGrid

unit Unit1;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, Grids;
 
type
  TForm1 = class(TForm)
    StringGrid1: TStringGrid;
    Button1: TButton;
    StringGrid2: TStringGrid;
    Edit1: TEdit;
    Button2: TButton;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.dfm}
 
procedure TForm1.FormCreate(Sender: TObject);
var
  i : integer;
begin
  for i := 1 to 14 do
  begin
    StringGrid1.Cells[0, i] := IntToStr(i);
    StringGrid1.Cells[0, 0] := 'Номер';
    StringGrid1.Cells[1, 0] := 'ФИО';
    StringGrid1.Cells[2, 0] := 'Дата рождения';
    StringGrid1.Cells[3, 0] := 'Табельный номер';
//так же заполняется все остальное
 
  end;
end;
 
 
procedure TForm1.Button1Click(Sender: TObject);
var i,j:integer;
    tmp:string;
begin
for i:=1 to StringGrid1.RowCount-2 do
for j:=i+1 to StringGrid1.RowCount-1 do
if StringGrid1.Cells[3,i]>StringGrid1.Cells[3,j] then
 begin
  tmp:=StringGrid1.Rows[i].Text;
  StringGrid1.Rows[i].Text:=StringGrid1.Rows[j].Text;
  StringGrid1.Rows[j].Text:=tmp;
 end;
end;
 
 
procedure TForm1.Button2Click(Sender: TObject);
var
 i : integer;
begin
 for i := StringGrid1.FixedRows to StringGrid1.RowCount - 1 do
 if StringGrid1.Cells[3, i] = Edit1.Text
  then begin
        StringGrid2.Rows[StringGrid2.RowCount - 1].CommaText := StringGrid1.Rows[i].CommaText;
        StringGrid2.RowCount := StringGrid2.RowCount + 1;
       end;
end;
 
end.

if StrToInt(StringGrid1.Cells[3,i])>StrToInt(StringGrid1.Cells[3,j]) then

function BinSearch(min,max,val:integer):integer;
var mid,n:integer;
begin
n:=max;inc(max);inc(n);
while (max>min) do
   begin
   mid:=min+(max-min) div 2;
   if val<=StrToInt(Form1.StringGrid1.Cells[3,mid]) then max:=mid else min:=mid+1;
   end;
 if (max<n) and (StrToInt(Form1.StringGrid1.Cells[3,max])=val) then Result:=max
 else Result:=-1;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
 i,n : integer;
begin
n:=BinSearch(1,14,StrToInt(Edit1.Text));
if n<0 then exit;
StringGrid2.Rows[StringGrid2.RowCount - 1].CommaText := StringGrid1.Rows[n].CommaText;
StringGrid2.RowCount := StringGrid2.RowCount + 1;
end;