constants LockItemEnum
The LockItemEnum type specifies how an item should behave in relation to the scrollable content - specifically whether it is locked to the top, bottom, or allowed to scroll normally. The LockItem property enables setting or getting the item's lock state - pinning it to the top, bottom, or allowing it to scroll. The LockItemEnum type supports the following values:

NameValueDescription
exLockTop-1 The item is locked at the top of the control. The LockedItemCount property specifies the number of items fixed on the top or bottom side of the control. Use the LockedItem property to access a locked item by its position.
exUnlock0 The item is not locked and scrolls with the content.
exLockBottom1 The item is locked at the bottom of the control. The LockedItemCount property specifies the number of items fixed on the top or bottom side of the control. Use the LockedItem property to access a locked item by its position.