有关TREE CONTROL 的 Expand!
BOOL Expand( HTREEITEM hItem, UINT nCode );
nCode
A flag indicating the type of action to be taken. This flag can have one of the following values:
TVE_COLLAPSERESET Collapses the list and removes the child items.
请问有人用过该标志吗?有成功删除子项目的吗,我试了几次,均告失败?不知是何原因?