GoControl is an ActiveX control that allows creation and editing of node link diagrams. Creation and editing are under full program control. At the developer's discretion, a powerful range of end-user editing capabilities can be enabled.
Nodes are scaleable to arbitrary sizes.
Nodes and links can have editable labels. Nodes and links can be created under program control and can be edited by the user's mouse actions. There is no limit on the number of nodes that can be created, other than memory available. As the user edits, your code receives events in order to manage your semantics. Reliability and performance are extremely good.