I follow this link from Microsoft to create Windows 10 context menu.
How to Create Cascading Menus with the SubCommands Registry Entry: https://docs.microsoft.com/en-us/windows/desktop/shell/how-to--create-cascading-menus-with-the-subcommands-registry-entry
However, I found if items in the context menu are more than a certain number. Windows only show part of the context menu items.
If I have a structure like this, it will end up showing the submenu1 and submenu2. If you have even more items for each submenu, it will only show submenu1.
My Context Menu
Submenu1
Items1
Items2
Items3
...
Submenu2
Items1
Items2
Items3
...
Submenu3
Items1
Items2
Items3
...
Also found similar questions but no answers for them too:
maximum right click context menu items limit
Can I bypass the 20 Item Limit for Statc Cascading Context Menus in Windows (Registry keys/subkeys)
