VB 窗口置顶

Option Explicit

Private Const HWND_TOPMOST = -1
Private Const HWND_NOTOPMOST = -2

Private Const SWP_NOMOVE = &H2
Private Const SWP_NOSIZE = &H1

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 Sub Command1_Click()
    SetWindowPos Me.hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE '置顶
End Sub

Private Sub Command2_Click()
    SetWindowPos Me.hwnd, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOMOVE Or SWP_NOSIZE '取消置顶
End Sub