Question about hierarchical essential grid

[Kalaora]

I have two datagrids. One is on my form. The other is on a control user. The fist works (I can expand it). The second doesn’t work. I lost the hierarchical level of my datagrid. Which is the code that makes the + sign appear at the left of the grid ?

Thanks for helping

[Administrator]

This is a duplicate post. Please see answers in othe post.
Stefan