مبانی علم رایانه

Option Explicit
Const SWP_NOMOVE = 2
Const SWP_NOSIZE = 1
Const FLAGS = SWP_NOMOVE Or SWP_NOSIZE
Const HWND_TOPMOST = -1
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 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


Private Sub Form_Load()
    Dim lR As Long
    lR = SetTopMostWindow(Form1.hwnd, True)
    'For inactive always on top Properties : lR = SetTopMostWindow(Form1.hwnd, False)
End Sub