[解答]
  shih704@ms2.hinet (Shih Chih-Wan):
  先到 開始 => 設定 => 工作列 => 自動隱藏.
  然後用 Excel (其它 Office 的軟體也可以 或 VB 或 VC)
  開一個 Module 工作表, 建立下列內容.

  Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal
  lpClassName As String, ByVal lpWindowName As String) As Long
  Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal
  hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As
  Long, ByVal cy As Long, ByVal wFlags As Long) As Long
  Declare Function CloseWindow Lib "user32" (ByVal hwnd As Long) As Long

  Const SWP_SHOWWINDOW = &h40
  Const SWP_HIDEWINDOW = &h80

  Sub SHOW_TASKBAR()
  q = FindWindow("Shell_traywnd", "")
  Call SetWindowPos(q, 0, 0, 0, 0, 0, SWP_SHOWWINDOW)
  End Sub

  Sub HIDE_TASKBAR()
  q = FindWindow("Shell_traywnd", "")
  Call SetWindowPos(q, 0, 0, 0, 0, 0, SWP_HIDEWINDOW)
  End Sub
 
  如果執行 HIDE_TASKBAR 那工作列就真的隱藏了! 要再執行 SHOW_TASKBAR 才會出現