https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.control.parentchanged?view=netframework-4.8.1&tree=cete.dynamicpdf.viewer.pdfnavigationpanel.parentchanged
Control.ParentChanged Event (System.Windows.Forms) | Microsoft Learn
Occurs when the Parent property value changes.
event systemwindows formscontrolmicrosoftlearn
https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.control.parentchanged?view=netframework-4.8.1&redirectedfrom=MSDN
Control.ParentChanged Event (System.Windows.Forms) | Microsoft Learn
Occurs when the Parent property value changes.
event systemwindows formscontrolmicrosoftlearn