程序代码 Private 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 Const SWP_NOMOVE = &H2 '不更动目前视窗位置 Const SWP_NOSIZE = &H1 '不更动目前视窗大小 Const HWND_TOPMOST = -1 '设定为最上层 Const HWND_NOTOPMOST = -2 '取消最上层设定 Const FLAGS = SWP_NOMOVE Or SWP_NOSIZE Private Sub Command1_Click() SetWindowPos Me.hwnd, HWND_TOPMOST, 0, 0, 0, 0, FLAGS  '置顶 End Sub Private Sub Command2_Click() SetWindowPos Me.hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, FLAGS '取消置顶 End Sub