unit1.pas

DELPHI经典程序

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Edit4: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure Label2Click(Sender: TObject);
  private
    { Private declarations }
  public
    procedure ShiftToAnother(Sender: TObject);
  end;

var
  Form1: TForm1;

implementation
uses Unit2;
{$R *.DFM}

procedure TForm1.ShiftToAnother(Sender: TObject);
 var
  I : Integer;
begin
  for I:= 0 to Screen.ActiveForm.ControlCount -1 do
    if Screen.ActiveForm.Controls[I] is TWinControl then
     if Screen.ActiveForm.Controls[I]= Screen.ActiveControl then
       begin
         (Screen.ActiveForm.Controls[I] as TEdit).Color := clRed;
         if Screen.ActiveForm is TForm1 then

          ( Screen.ActiveForm as TForm1).Label1.Caption
              := Screen.ActiveControl.Name+'  Actives'

         else if Screen.ActiveForm is TForm2 then

            ( Screen.ActiveForm as TForm2).Label1.Caption
                := Screen.ActiveControl.Name+'  Actives';
       end
     else
       (Screen.ActiveForm.Controls[I] as TEdit).Color := clAqua;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Screen.OnActiveControlChange := ShiftToAnother;
end;
procedure TForm1.Label2Click(Sender: TObject);
begin
  Form2.Show;
end;

end.