Bonjour,
Tu as essayé avec Repaint dans l'évènement Scroll ?
Private Sub UserForm_Scroll(ByVal ActionX As MSForms.fmScrollAction, _
ByVal ActionY As MSForms.fmScrollAction, _
ByVal RequestDx As Single, _
ByVal RequestDy As Single, _
ByVal ActualDx As MSForms.ReturnSingle, _
ByVal ActualDy As MSForms.ReturnSingle)
Me.Repaint
End Sub