The TVM_INSERTITEM message inserts a new item in a tree-view control. You can send this message explicitly or by using the TreeView_InsertItem macro.
TVM_INSERTITEM
wParam = 0;
lParam = (LPARAM) (LPTV_INSERTSTRUCT) lpis;
Parameters
lpis
Pointer to a TV_INSERTSTRUCT structure that specifies the attributes of the tree-view item.
Return Values
Returns the handle to the new item if successful or NULL otherwise.
See Also