Expand row without triggering cell click

Windows, Hierarchical Listbox.
I would like to click on the expand/collapse icon of rows that are folders to enable expand and collapse - but I do not want to trigger the cell-click event.
Is there a way to do that?
Is it a bug that clicking on the icon also triggers cell-click?

Subclass the listbox add a property Icon_Clicked As Boolean and wrap your cell-click event in an if statement, then after the end if make Icon_Clicked false again.