By default, the ScrollBySingleLine property is False. We recommend to set the ScrollBySingleLine property on True if you have one of the following:

• If you have at least a cell that has CellSingleLine property on exCaptionWordWrap / exCaptionBreakWrap / False, or a column with Def(exCellSingleLine) on exCaptionWordWrap / exCaptionBreakWrap / False
• If the control displays items with different height. Use the ItemHeight property to specify the item's height.

Use the EnsureVisibleItem property to ensure that an item fits the control's client area.  Use the ScrollBars property to hide the control's scroll bars. Use the ItemsAllowSizing property to specify whether all items are resizable or not. Use the ItemAllowSizing property to specify whether the user can resize the item at runtime.