[RESOLVED] Child items in a listview

[Chris001]

Hello, I found the project below that is a Listview with child items in the first column (like a treeview).

When you double-click on an item it expands and adds 10 child items. What I'd like to do is add child items without expanding, so the child items are not visible, but still can be used. After playing around with it for an hour I haven't been able to do it.

Is there anybody who wants to take a look at the code and tell me if it's possible to add child items in the first column without expanding and making them visible?

Thank you.