et voilà :
Private Declare Function GetWindowLongA Lib "User32" _
(ByVal hwnd As Long, ByVal nIndex As Long) As Long
Private Declare Function SetWindowLongA Lib "User32" _
(ByVal hwnd As Long, ByVal nIndex As Long, _
ByVal dwNewLong As Long) As Long
Private Declare Function FindWindowA Lib "User32" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Sub UserForm_Initialize()
Dim hwnd As Long
hwnd = FindWindowA("Thunder" & IIf(Application.Version Like "8*", _
"X", "D") & "Frame", Me.Caption)
SetWindowLongA hwnd, -16, GetWindowLongA(hwnd, -16) And &HFFF7FFFF
End Sub
bye
stephane