Delphi Ttreeview Study (II.)--Ttreenodes

Attributes to understand:

Count	Property Count:integer; Use Count to determine the number of ' tree nodes ' in the ' tree view ' that owns ' the tree nodes object. Count provides an upper bound when iterating through the "entries in the" Item property array.
Handle	Property handle:hwnd; Use Handle to obtain the Handle of the "tree view" owns the tree nodes object.
Item	Property Item[index:integer]: Ttreenode; Default Use Item to access to a node by its position in the tree view. The ' has ' of the ' 0 ', the second of index of 1, and. The Item is the ' default ' for Ttreenodes. This is means that the name of the Item can is omitted when indexing into the set of tree nodes. Thus, the line Firstnode: = Treeview1.items.item[0]; can be written Firstnode: = Treeview1.items[0];
Owner	Property owner:tcustomtreeview; Use the "Owner" to access the "tree view Control" Displays the nodes maintained by the Ttreenodes object.