Yes, obviously. They are Visible by default and I have not touched them.
Literally, I only dropped the Scrollbox on the form and did not touch anything, apart from setting its alignment to alClient.
I have added some debug info in the OnResize event of my control. See below.
I have added a button that increases the size of my control of 10px on every click.
Parent is the Scrollbox, Self is my control. As you can see, my control width becomes bigger while the Scrollbox width stays the same. I assume this should show the scrollbars but it's not happening.
Parent size - (t,l,w,h): (0,0,1155,776)
Self size - (t,l,w,h): (0,0,1163,774)
Parent size - (t,l,w,h): (0,0,1155,776)
Self size - (t,l,w,h): (0,0,1173,774)
Parent size - (t,l,w,h): (0,0,1155,776)
Self size - (t,l,w,h): (0,0,1183,774)
Parent size - (t,l,w,h): (0,0,1155,776)
Self size - (t,l,w,h): (0,0,1193,774)
Parent size - (t,l,w,h): (0,0,1155,776)
Self size - (t,l,w,h): (0,0,1203,774)
Parent size - (t,l,w,h): (0,0,1155,776)
Self size - (t,l,w,h): (0,0,1213,774)
Parent size - (t,l,w,h): (0,0,1155,776)
Self size - (t,l,w,h): (0,0,1223,774)