Show Systems Disk Space

// Ali Ebrahimi (ebr_ali@yahoo.com)
unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
ComboBox1: TComboBox;
procedure FormCreate(Sender: TObject);
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
Free1,free2,Total1:Int64;

begin

GetDiskFreeSpaceEx(pchar(ComboBox1.Text) , free1 , total1 , @free2);
Label1.Caption := 'Capacity : ' + IntToStr(Total1) + ' Byte '+ floatToStr(Total1 div (1024*1024)) + ' MB';
Label2.Caption := 'Free space : ' + IntToStr(Free1) + ' Byte '+ floatToStr(Free1 div (1024*1024)) + ' MB';
Label3.Caption := 'Used space : ' + IntToStr(Total1-Free1) + ' Byte '+ floatToStr((Total1-Free1) div (1024*1024)) + ' MB';

end;

procedure TForm1.FormCreate(Sender: TObject);
var
i:Integer;
begin
for i:=Ord('A') to Ord('Z') do
begin
if GetDriveType(pchar(char(i)+':\'))=3 then
ComboBox1.Items.Add(char(i)+':\');
end;
ComboBox1.Text:=ComboBox1.Items.Strings[0];
end;

end.