i've been working a lot with listview recently, and found out that groups can be created to expand/collapse the items that belong to them. While a state does exist to collapse it a will, a state does not exist to expand a group within a listview at will.
So that got me thinking, how do message boxes, treeview, listviews and other controls that don't use GUIGetMsg() to capture mouse clicks work? If I click "ok" on a message box, how does it automatically know to close it out? Same with a list/treeview, if I click on the "+" sign, how does it know to expand or collapse a group? Where is all that defined?
