Database, Sessions and Scattering

unit hello;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, DB, DBTables;

type
  TForm1 = class(TForm)
    Query : TQuery;
    DataSource : TDataSource;
    Database : TDatabase;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Edit4: TEdit;
    Edit5: TEdit;
    Edit7: TEdit;
    Edit8: TEdit;
    Edit9: TEdit;
    Edit10: TEdit;
    Edit11: TEdit;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}
procedure TForm1.Button1Click(Sender: TObject);
  procedure CreateQuery;
   const
      QueryName = 'select employeeid\n' +
                   'from details\n';

  begin
           Database.DatabaseName := 'Peracc.mdb';
           Query.DatabaseName := 'Peracc.mdb';
           Query.Open;
           DataSource.Dataset := Query;

           {   edit1.ext := DataSource.Dataset.company.text;}
  end;
begin

end;
end.


With the above code snippnet, I'd like to raise 3 questions...

part 1.   Database.DatabaseName := 'Peracc.mdb';
          Query.DatabaseName := 'Peracc.mdb';

          Are these statements workable?

part 2.  How do I deal with the 'session' thing?

part 3. How do I scatter the variable 'employeeid' into edit1 (A textbox in C++ sense)?

severely urgent!
Thanks
Jacky