https://learn.microsoft.com/es-es/dotnet/api/system.windows.forms.control.updatezorder?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0&redirectedfrom=MSDN
Control.UpdateZOrder Method (System.Windows.Forms) | Microsoft Learn
Updates the control in its parent's z-order.
windows formscontrolmethodsystemmicrosoft