How can I display +/- icons on my tree view?

Question

I want to make a tree view where items show a "+" icon when closed and a "-" icon when open. Just like the Windows XP explorer. However, I can't find out how to get the icons. Do I get them from the system or do I need to provide my own?

Answer 1

The tree-view control will display the icons if you set the TVS_HASBUTTONS style.