Implementation of Interface of webbrowser control

I want to handle doDragDrop function of IDocHostUIHandler so as to create a DLL in which the drag and drop functionality is disabled.

I am developing a customized web browser in VB6 using microsoft internet controls; for which I need that the user cannot drag any links from the browser onto the desktop.that developing an application using web browser control in vb6. I want to stop dragging of the link,so that one can't drop that link outside the application.

After reading some article I found that ,this is possible in VC++ if we override the function of the interfaces like
IDocHostUIHandler or
IDocHostUIHandler2 or
IDocHostShowUI.

So please tell me which function should be overridden and in which interface; and how should I go about this.