zeromemoryu.pas

DelphiWin32核心API参考光盘内容.是学习书籍中的源码,便于学习.

unit ZeroMemoryu;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    StringGrid1: TStringGrid;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  TheArray: array[0..200] of byte;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
  iLoop: integer;
begin
  {initialize the array with some random values}
  for iLoop :=0 to 200 do
  begin
    TheArray[iLoop] := iLoop;
    StringGrid1.Cells[iLoop,0] := IntToStr(TheArray[iLoop]);
  end;

  {toggle button states}
  Button1.Enabled := FALSE;
  Button2.Enabled := TRUE;
end;      

procedure TForm1.Button2Click(Sender: TObject);
var
  iLoop: integer;
begin
  {zero the memory}
  ZeroMemory(@TheArray, SizeOf(TheArray));

  {display the zeroed values}
  for iLoop :=0 to 200 do
  begin
    StringGrid1.Cells[iLoop,0] := IntToStr(TheArray[iLoop]);
  end;
end;

end.