>Does anyone know if it is possible to implement a custom VFP context/shortcut menu on the web browser control hosted in a VFP form?

Any DHTML element to which you want to attach your own contextmenu needs to have a redirection into your JavaScript code, like this

onContextMenu="rclick(event);"

where rclick(e) is your piece of JavaScript:

function rclick(e)
{
	var targ
	if (!e) 
		var e = window.event;
	if (e.target) 
		targ = e.target
	else if (e.srcElement) 
		targ = e.srcElement;
	e.returnValue=false;
	oFrm=document.forms[0];
	oFrm.action="YourProtocolHere:"+targ.name;
	oFrm.submit();
	return false;
}

Then you catch your protocol in oBrowser.BeforeNavigate2, make sure cancel=.t. so it doesn't try to navigate anywhere. You may also add code to catch some coordinates (browser's event object has a few properties which may help, but you'll need to recalculate the position) so to know where to show your VFP popup.