mainfrm.pas

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unit MainFrm;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    ListBox1: TListBox;
    Label1: TLabel;
    StaticText1: TStaticText;
    Bevel1: TBevel;
    Label2: TLabel;
    procedure Edit1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure ListBox1DragDrop(Sender, Source: TObject; X, Y: Integer);
    procedure Label1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure ListBox1DragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Edit1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
 if Button=mbLeft then
  Edit1.BeginDrag(False,10);
end;

procedure TForm1.ListBox1DragDrop(Sender, Source: TObject; X, Y: Integer);
begin

    if (Source=Edit1) and (Sender=ListBox1) then
        ListBox1.Items.Add(Edit1.Text);

    if (Source=Label1) and (Sender=ListBox1)  then
        ListBox1.Items.Add(Label1.Caption);
end;

procedure TForm1.Label1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
 if Button=mbLeft then
  Label1.BeginDrag(False,10);
end;

procedure TForm1.ListBox1DragOver(Sender, Source: TObject; X, Y: Integer;
  State: TDragState; var Accept: Boolean);
begin
 if (Source=Edit1) or (Source=Label1) then
  begin
   Accept:=True;
  end;
end;

end.