>Anyone can give me the information of how to use TreeView Control? I am using VFP 7.0

There are some good start up articles in the UT Magazine. Cetin B has one and a couple of more have contributed. The VFP docs are all VB VBA. One hill you need to climb would be the VBA one - it's not difficult. The more we practice, the more we understand what "NODE" and "NODES" are all about!