Delphi GUI Design Specifications and Guidelines ListView TreeView vcl data structure ListView columns items Treeview treeNode AddChild Delphi enumeration, set, subrange, and any other ordinal type Marco Cantů Essential Pascal RTTI OrdType program ordinal

 https://stackoverflow.com/questions/5737820/delphi-gui-design-specifications-and-guidelines

https://learn.microsoft.com/en-us/previous-versions/ms997619(v=msdn.10)?redirectedfrom=MSDN
https://learn.microsoft.com/zh-tw/windows/win32/windows-application-ui-development?redirectedfrom=MSDN
http://docwiki.embarcadero.com/RADStudio/Athens/en/Designing_User_Interfaces
https://www.gexperts.org/
https://www.cnpack.org/showlist.php?id=39&lang=en
https://stackoverflow.com/questions/1497230/what-is-the-accepted-way-to-use-frames-in-delphi
https://delphisources.ru/pages/faq/master-delphi-7/content/LiB0088.html
https://www.marcocantu.com/epascal/English/ch04udt.htm

https://www.marcocantu.com/epascal/English/ch04udt.htm
Delphi enumeration, set, subrange, and any other ordinal type
Marco Cantů Essential Pascal RTTI OrdType program  ordinal