Connaitre la mémoire (RAM) totale et libre

procedure TForm1.Button1Click(Sender: TObject);
var
memory:TMemoryStatus;

begin
memory.dwLength:=sizeof(memory);
GlobalMemoryStatus(memory);
ShowMessage('Total RAM / total memory: '+inttostr(memory.dwTotalPhys)+'Bytes');
ShowMessage('Freie RAM / available memory: '+inttostr(memory.dwavailPhys)+'Bytes');
end;