Hello, you can use a treeview ActiveX control and Browser Helper Objects ActiveX control, both from Microsoft. Please refer to msdn.microsoft.com for more information on ActiveX controls available from Microsoft.
CVI 7.0 has a custom filebrowser control. In the UI editor Create menu>>Custom Controls>>Toolslib Controls select the File Browser control and put the UI editor in operate mode, and you have an explorer type file system control on your panel.