unit Unit1;

 

interface

 

uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs;

 

type

  TForm1 = class(TForm)

    procedure FormCreate(Sender: TObject);

  private

    { Private declarations }

    procedure AppIdle(Sender: TObject; var Done: Boolean);

  public

    { Public declarations }

  end;

 

var

  Form1: TForm1;

 

implementation

 

{$R *.dfm}

 

procedure TForm1.AppIdle(Sender: TObject; var Done: Boolean);

begin

if GetAsyncKeyState(VK_SNAPSHOT) <> 0 then

    Form1.Caption := 'PrintScreen íàæàòà !';

  Done := True;

end;

 

procedure TForm1.FormCreate(Sender: TObject);

begin

Application.OnIdle := AppIdle;

end;

end.

type

  TForm1 = class(TForm)

    procedure FormCreate(Sender: TObject);

    procedure FormDestroy(Sender: TObject);

  private

    { Private declarations }

    procedure WMHotKey(var Msg : TWMHotKey); message WM_HOTKEY;

  public

    { Public declarations }

  end;

 

var

  Form1: TForm1;

 

implementation

 

{$R *.DFM}

 

const id_SnapShot = 101;

 

procedure TForm1.WMHotKey (var Msg : TWMHotKey);

begin

  if Msg.HotKey = id_SnapShot then

    ShowMessage('GotIt');

end;

 

procedure TForm1.FormCreate(Sender: TObject);

begin

  RegisterHotKey(Form1.Handle,

                 id_SnapShot,

                 0,

                 VK_SNAPSHOT);

end;

 

procedure TForm1.FormDestroy(Sender: TObject);

begin

  UnRegisterHotKey (Form1.Handle, id_SnapShot);

end;