tree_item_ 成员列表

成员的完整列表，这些成员属于 tree_item_,包括所有继承而来的类成员

bExpand	tree_item_
hLayout	tree_item_
hTemp	tree_item_
nDepth	tree_item_
nHeight	tree_item_
nID	tree_item_
nSelHeight	tree_item_
nState	tree_item_
nUserData	tree_item_
rcItem	tree_item_