how to enable horizontal scroll in listview?are there a conditions for that(size)?

[LUIZ GUILHERME]

Hi everyone. I have visual basic comunity 2017, and a program with a form, a listview, a label and a button, with which I test cloning several Column headers with names “col 1”, “col 2”,etc.
As I add column headers, the label shows the number of columns, no matter how many. That’s ok.works
The cloning part is ok too,off course, because the label shows correctly as I add the columns. I clone hundreds if I want.
But the problem is that, no matter how many column headers get in listview, listview just can’t show neither the headers beyond the size of the listview (although label shows them growing..), neither the horizontal scroll of the listview. In other words, they are being created but can’t be seen because there’s no horizontal scrolling.
Below is the code I’m using (“visible = true” and “details view” are used when form is loaded. See the code please)