Protg_Tela

O exemplo a seguir leva um botão no form e chama a proteção de tela:

//---------------------------------------------------------------------------
#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
SendMessage(this ->Handle,WM_SYSCOMMAND,
SC_SCREENSAVE,0);
}
//---------------------------------------------------------------------------