merci... mais ca ne marche toujours pas
le pb vientil du fait de mon code d'initialisation ?
Private Sub UserForm_Initialize()
Dim hWnd As Long, exLong As Long, zFactor As Integer
hWnd = FindWindowA(vbNullString, Me.Caption)
exLong = GetWindowLongA(hWnd, -16)
If exLong And &H880000 Then SetWindowLongA hWnd, -16, exLong And &HFF77FFFF
zFactor = 100 * CInt(Application.Width / Me.Width)
If zFactor > 400 Then zFactor = 400
Me.Width = Application.Width
Me.Height = Application.Width
Me.Zoom = zFactor
End Sub