Introduction - If you have any usage issues, please Google them yourself
My code under: TreeCtrl add a response message, TVN_ITEMEXPANDED news. After adding function automatically add such a statement: NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*) pNMHDR when expanded or retracted will stimulate this function, in which the action parameter structure pointer pNMTreeView, on the record is open or closed, that