https://learn.microsoft.com/es-es/dotnet/api/system.windows.forms.control.getnextcontrol?view=netframework-4.8.1&redirectedfrom=MSDN
Control.GetNextControl(Control, Boolean) Method (System.Windows.Forms) | Microsoft Learn
Retrieves the next control forward or back in the tab order of child controls.
windows formscontrolbooleanmethodsystem