unit Unit1; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls; type TForm1 = class(TForm) Edit1: TEdit; Button1: TButton; Label1: TLabel; Label2: TLabel; procedure Button1Click(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:= ‘该驱动器总共容量‘ + Formatfloat(‘###,##0‘,cl2) + ‘字节‘; Label2.Caption := ‘该驱动器可用容量‘ + Formatfloat(‘###,##0‘,cl1) + ‘字节‘; end; end.