任务栏显示进度条 CreateComObject(CLSID_TaskbarList) as ITaskbarList4

http://www.cnblogs.com/jxsoft/archive/2011/06/02/2067712.html

//在任务栏显示 进度条

unit Unit9;
interface
uses
  System.Classes, System.SysUtils, Vcl.Controls, Vcl.Forms, Vcl.StdCtrls,
  Vcl.ExtCtrls, ShlObj;
  //ShellAPI,  ObjectArray, PropSys, ExtCtrls, ImgList, DwmApi;
type
  TForm9 = class(TForm)
    btnProgressbar: TButton;
    tmr1: TTimer;
    edtValue: TEdit;
    btnSetValue: TButton;
    procedure FormCreate(Sender: TObject);
    procedure btnProgressbarClick(Sender: TObject);
    procedure tmr1Timer(Sender: TObject);
    procedure btnSetValueClick(Sender: TObject);
  private
    { Private declarations }
    TBL: ITaskbarList4;
    I: Integer;
  public
    { Public declarations }
  end;
var
  Form9: TForm9;
implementation
uses  ComObj;
//uses ActiveX, ComObj, Math;
{$R *.dfm}
procedure TForm9.btnSetValueClick(Sender: TObject);
begin
  TBL.SetProgressValue(Handle, StrToIntDef(edtValue.Text, ), ); //设置值 和最大值
end;
procedure TForm9.btnProgressbarClick(Sender: TObject);
begin
  tmr1.Enabled := not tmr1.Enabled;//定时器
end;
procedure TForm9.FormCreate(Sender: TObject);
begin
  I := ;
  TBL := CreateComObject(CLSID_TaskbarList) as ITaskbarList4; //创建对象
  TBL.SetProgressState(Handle, TBPF_NOPROGRESS or TBPF_INDETERMINATE); //初始化
  // or TBPF_INDETERMINATE
end;
procedure TForm9.tmr1Timer(Sender: TObject);
begin
  if I <  then
    Inc(I);
  TBL.SetProgressValue(Handle, I, );
  if I >=  then
  begin
    TBL.SetProgressState(Handle, TBPF_NOPROGRESS);
    tmr1.Enabled := False;
    I := ;
  end;
end;
end.

object Form9: TForm9
  Left =
  Top =
  Caption = ########
  ClientHeight =
  ClientWidth =
  Color = clBtnFace
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -
  Font.Name = 'Tahoma'
  Font.Style = []
  OldCreateOrder = False
  OnCreate = FormCreate
  PixelsPerInch =
  TextHeight =
  object btnProgressbar: TButton
    Left =
    Top =
    Width =
    Height =
    Caption = #####
    TabOrder =
    OnClick = btnProgressbarClick
  end
  object edtValue: TEdit
    Left =
    Top =
    Width =
    Height =
    ImeName = ##' ('##') - '#######
    TabOrder =
  end
  object btnSetValue: TButton
    Left =
    Top =
    Width =
    Height =
    Caption = #######
    TabOrder =
    OnClick = btnSetValueClick
  end
  object tmr1: TTimer
    Enabled = False
    Interval =
    OnTimer = tmr1Timer
    Left =
    Top =
  end
end