untifrmmain.pas

精彩编程百例51～75 其中有 cpu速度测试 检测声卡 查询内存信息 图像处理技巧 模拟放大镜效果等待

unit untiFrmMain;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    GroupBox1: TGroupBox;
    Button2: TButton;
    Label1: TLabel;
    Label2: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
driver:pchar;
sec1, byt1, cl1, cl2:longword;
begin
    driver:=pchar(edit1.text);//要显示的驱动器名
    GetDiskFreeSpace(driver, sec1, byt1, cl1, cl2);
    cl1 := cl1*sec1 * byt1;
    cl2 := cl2*sec1 * byt1;
    Label1.Caption:= '本驱动器总共容量' + Formatfloat('###,##0',cl2) + '字节        ';
    Label2.Caption := '本驱动器可用容量' + Formatfloat('###,##0',cl1) + '字节         ';
    case GetDriveType(pchar(edit1.text)) of
      DRIVE_REMOVABLE:
        edit2.text:='驱动器是可移动驱动器'; //如果是硬盘
      DRIVE_FIXED:
        edit2.text:='驱动器是固定驱动器';
      DRIVE_REMOTE:
        edit2.text:='驱动器是网络驱动器';
      DRIVE_CDROM:
        edit2.text:='驱动器是光盘驱动器';
      DRIVE_RAMDISK:
        edit2.text:='驱动器是虚拟驱动器';

    end;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
 edit1.text:='';
 edit2.text:='';
 label1.Caption:='';
 label2.Caption:='';

end;

end.