1.建立新的 [標準執行檔] 專案，根據預設值，隨即建立 Form1。 2.在 Form1 上加入兩個指令按鈕 (Command1 與 Command2)。 3.將 Command1 的標題 (Caption) 屬性設為「Always on top」。 4.將 Command2 的標題 (Caption) 屬性設為「Normal」。 5.將下面程式碼放入 Form1 的 [宣告] 區段中： Option Explicit Private Sub Command1_Click() Dim lR As Long lR = SetTopMostWindow(Form1.hwnd, True) End Sub Private Sub Command2_Click() Dim lR As Long lR = SetTopMostWindow(Form1.hwnd, False) End Sub6.在 [專案] 功能表上，按一下 [新增模組]，在專案中加入新模組。 7.將下面程式碼加入新模組中： Option Explicit Public Const SWP_NOMOVE = 2 Public Const SWP_NOSIZE = 1 Public Const FLAGS = SWP_NOMOVE Or SWP_NOSIZE Public Const HWND_TOPMOST = -1 Public Const HWND_NOTOPMOST = -2 Declare Function SetWindowPos Lib "user32" Alias "SetWindowPos" _ (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 Public Function SetTopMostWindow(hwnd As Long, Topmost As Boolean) _ As Long If Topmost = True Then 'Make the window topmost SetTopMostWindow = SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, _ 0, FLAGS) Else SetTopMostWindow = SetWindowPos(hwnd, HWND_NOTOPMOST, 0, 0, _ 0, 0,FLAGS) SetTopMostWindow = False End If End Function