让窗口一直在上面

让窗口一直在上面

http://www.tongyi.net 作者:天涯风铃 点击:419

很多流行软件都有这样一个选项：Always on Top。它可以让窗口在最上面，别的窗口不能覆盖它。我们在 VB 中，可以使用下面的方法来实现：

Private Const SWP_NOSIZE = &H1

Private Const SWP_NOMOVE = &H2

Private Const SWP_NOZORDER = &H4

Private Const SWP_NOREDRAW = &H8

Private Const SWP_NOACTIVATE = &H10

Private Const SWP_FRAMECHANGED = &H20

Private Const SWP_SHOWWINDOW = &H40

Private Const SWP_NOCOPYBITS = &H80

Private Const SWP_NOOWNERZORDER = &H200

Private Const SWP_DRAWFRAME = SWP_FRAMECHANGED

Private Const SWP_NOREPOSITION = SWP_NOOWNERZORDER

Private Const HWND_TOP = 0

Private Const HWND_BOTTOM = 1

Private Const HWND_TOPMOST = -1

Private Const HWND_NOTOPMOST = -2

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

Private mbOnTop As Boolean

Private Property Let OnTop (Setting As Boolean)

if Setting Then

SetWindowPos hwnd, -1, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE

Else

SetWindowPos hwnd, -2, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE

End If

mbOnTop = Setting

End Property

Private Property Get OnTop() As Boolean

'Return the private variable set in Property Let

OnTop = mbOnTop

End Property

调用 OnTop=True 即可让窗口 Always On Top。