_TreeView.ShowCheck (gb.qt4)
Property ShowCheck As Boolean
Since 3.15
Return or set if selection is indicated by check boxes and radio buttons, or by highlighting the items.
Check boxes are used in multiple selection mode, radio buttons in single selection mode.
Warning: if using GTK+ toolkit the checkbox or radio images are
always rendered as 22x22px.
These images will not show correctly if the item height is too small.
Eg, if it only has a single line of text, no picture and a font size less than 14px