做一個自己的任務欄

用該程序可以做一個自己的任務欄，包括列舉出任務欄上程序的Handle、WindowName、程序路徑、圖標。可選定窗口並提前，或者在程序間切換。
如果你的程序是滿屏的，並且屏蔽了系統鍵的話，或許可以用到下面的技巧。

********************* AppTabP.dpr
program AppTabP;

uses
  Forms,
  AppTab_f in AppTab_f.pas {AppTab};

{$R *.res}

begin
  Application.Initialize;
  Application.CreateForm(TAppTab, AppTab);
  Application.Run;
end.

************************ AppTab_f.pas
unit AppTab_f;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, TLHelp32,Buttons,ShellAPI, ExtCtrls, ImgList;

type
  TAppTab = class(TForm)
    ListBox1: TListBox;
    BitBtn1: TBitBtn;
    CaptionListBox: TListBox;
    PathListBox: TListBox;
    HwndListBox: TListBox;
    Label1: TLabel;
    tempImageList: TImageList;
    tempImage: TImage;
    procedure BitBtn1Click(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
    procedure FormShow(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
    AppList:TStrings;
    AppName_Btn:Array[0..20] of TBitBtn;
    procedure AppName_BtnClickHandle(Sender:TObject);
    public
    { Public declarations }
  end;

var
  AppTab: TAppTab;
  //得到窗口WindowName
  function GetText(Wnd:HWND):string;
  //遍歷窗口
  function EnumWindowsProc(Wnd:HWND;LParam:LPARAM):BOOL;stdcall;
  //由進程Handle得到程序名（含路徑）
  function WndToProc(hwnd:HWND):String;
  //取得外部程序的圖標，是目錄就取文件夾圖標
  function GetFileIcon(const Filename:String;SmallIcon:Boolean):HICON;
implementation

{$R *.dfm}
function GetText(Wnd:HWND):string;
var TextLength:Integer;
    Text:PChar;
begin
  TextLength:=SendMessage(Wnd,WM_GETTEXTLENGTH,0,0);
  if TextLength=0 then Result:=
  else
    begin
      GetMem(Text,TextLength+1);
      SendMessage(Wnd,WM_GETTEXT,TextLength+1,Integer(Text));
      Result:=Text;
      FreeMem(Text);
    end;
end;

function EnumWindowsProc (Wnd: HWND; LParam: LPARAM): BOOL; stdcall;
begin
  Result := True;
  if (IsWindowVisible(Wnd) or IsIconic(wnd)) and
   ((GetWindowLong(Wnd, GWL_HWNDPARENT) = 0) or
    (GetWindowLong(Wnd, GWL_HWNDPARENT) = GetDesktopWindow)) and
   (GetWindowLong(Wnd, GWL_EXSTYLE) and WS_EX_TOOLWINDOW = 0) then
  begin
    if Wnd<>Application.Handle then
      begin
        AppTab.Listbox1.items.add(Inttostr(Wnd)+*****+GetText(Wnd)+*****+WndToProc(Wnd));
        AppTab.HwndListBox.items.add(Inttostr(Wnd));
        AppTab.CaptionListBox.items.add(GetText(Wnd));
        AppTab.PathListBox.Items.Add(WndToProc(Wnd));
        //以下把圖標加到ImageList中，為了動態生成按紐時使用
        if Copy(WndToProc(Wnd),Length(WndToProc(Wnd))-12,13)=EXPLORER.EXE then
          AppTab.tempImage.Picture.Icon.Handle:=ExtractIcon(//
            HINSTANCE,PChar(GetEnvironmentVariable(windir)+systemShell32.dll),3)
        else AppTab.tempImage.Picture.Icon.Handle:=ExtractIcon(hInstance,PChar(WndToProc(Wnd)),0);
        AppTab.tempImageList.AddIcon(AppTab.tempImage.Picture.Icon);
      end;
  end;
end;

procedure TAppTab.BitBtn1Click(Sender: TObject);
var AppNum:Integer;
begin
  for AppNum:=0 to ListBox1.Items.Count-1 do
    begin
      AppName_Btn[AppNum]:=TBitBtn.Create(Self);
      AppName_Btn[AppNum].Hint:=CaptionListBox.Items[AppNum];
      AppName_Btn[AppNum].Caption:=Copy(CaptionListBox.Items[AppNum],1,8);
      AppName_Btn[AppNum].Parent:=Self;
      AppName_Btn[AppNum].Left:=82*AppNum;
      AppName_Btn[AppNum].Width:=80;
      AppName_Btn[AppNum].ShowHint:=True;
      AppName_Btn[AppNum].Layout:=blGlyphLeft;
      AppName_Btn[AppNum].OnClick:=AppName_BtnClickHandle;
      AppName_BTN[AppNum].Tag:=StrToInt(HwndListBox.Items[AppNum]);//把Tag屬性使用起來，在SetForegroundWindow時可以直接用
      //給按紐加圖標
      tempImageList.GetBitmap(AppNum,AppName_Btn[AppNum].Glyph);
    end;
end;

function WndToProc(hwnd:HWND):String;
var PID:DWORD;
    ok:Boolean;
    ProcessListHandle: THandle;//進程列表的句柄
    ProcessStruct:PROCESSENTRY32; //進程的結構，進程的信息都在這個結構裡
begin
  Result:=;
  GetWindowThreadProcessId(hwnd, PID);
  ProcessListHandle:=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
  ProcessStruct.dwSize:=Sizeof(ProcessStruct);
  ok:=Process32First(ProcessListHandle,ProcessStruct);
  while ok do
    begin
      if PID=ProcessStruct.th32ProcessID then Break;
      ok:=Process32Next(ProcessListHandle,ProcessStruct);
    end;
  CloseHandle(ProcessListHandle);
  Result:=ProcessStruct.szExeFile;
end;

procedure TAppTab.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
  AppList.Free;
end;

procedure TAppTab.FormShow(Sender: TObject);
begin
  ListBox1.Clear;
  EnumWindows(@EnumWindowsProc,Sizeof(Integer));
end;

procedure TAppTab.FormCreate(Sender: TObject);
begin
  AppList:=TStringList.Create;
end;

procedure TAppTab.AppName_BtnClickHandle(Sender:TObject);
begin
  //把Tag使用起來,它不是廢物!!
  ShowWindow(TBitBtn(Sender).Tag, SW_SHOW);
  ShowWindow(TBitBtn(Sender).Tag, SW_RESTORE);
  SetForegroundWindow(TBitBtn(Sender).Tag);
  //上面為什麼要用三句呢？奇怪啊
end;

function GetFileIcon(const Filename:String;SmallIcon:Boolean):HICON;
var info:TSHFILEINFO;
    Flag:Integer;
begin
  if SmallIcon then Flag:=(SHGFI_SMALLICON or SHGFI_ICON)
  else Flag:=(SHGFI_LARGEICON or SHGFI_ICON);
  SHGetFileInfo(Pchar(Filename),0,info,Sizeof(info),Flag);
  Result:=info.hIcon;
end;

end.

****************************** AppTab_f.dfm
object AppTab: TAppTab
  Left = 4
  Top = 87
  Width = 797
  Height = 424
  C