InDesign CS6 and relinking resources with ILinkFacade

Question

I've been trying to relink InDesign document links but rather unsuccessfully. I did read that ILinkFacade should be the way to go but the documentation is somewhat poor. I did find some SDK examples but they didn't have too much code about ILinkFacade. I ended up reading comments from ILinkFacade source code.
I came up with the following piece of code that happens in Respond function inherited from CResponder:
Utils< Facade::ILinkFacade > LinkFacade;
InterfacePtr< IDocumentSignalData > DocumentSignalData( signalMgr, UseDefaultIID() );
IDatabase* pDocumentDatabase = GetDataBase( DocumentSignalData );
UIDList LinksUIDList( pDocumentDatabase ); // Does this actually get the links from a document?
UIDRef linkref = LinksUIDList.GetRef( 0 ); // If the above does get the list of links, does this get the UIDRef to the first link in the list?
URI ImageURI = "D:/test.jpg";
ErrorCode status = LinkFacade->RelinkResource( linkref, ImageURI, kSuppressUI );
Compiles nicely but every time I run it I just manage to crash InDesign.
Anyone have any good tips to this? I'm quite unsure especially about using the UIDList.

Answer 1

I made some minor modifications to my code and used QueryLinks to get all the links in a QueryResult.
// signalMgr is received in Respond(...) inherited from CResponder.
InterfacePtr< IDocumentSignalData > pDocumentSignalData( signalMgr, UseDefaultIID() );
InterfacePtr< ILinkManager > pLinkManager( pDocumentSignalData->GetDocument(), UseDefaultIID() );
ILinkManager::QueryResults results;
LinkQuery query;
pLinkManager->QueryLinks( query, kIDLinkClientID, results );
Utils< Facade::ILinkFacade > LinkFacade;
// All the links should now be in results and we can go through all of them.
for( unsigned int i = 0; i < results.size(); i++ )
    UIDRef LinkUIDRef( GetDataBase( pDocumentSignalData ), results.at( i ) );
    // Check if the link is relinkable.
    if( LinkFacade->CanRelinkResource( LinkUIDRef ) )
The UIDs can be used (I tried deleting links via pLinkManager->DeleteLink) so they seem to be fetched correctly now. But right now LinkFacade->CanRelinkResource always tells me that none of my links are relinkable. I tried to test my UIDRefs with if( LinkUIDRef ) but it seemed to always evaluate to false. This probably has something to do with why CanRelinkResource always evaluates to false because it used UIDRef instead of UID. So I am probably doing something wrong with UIDRefs here but I can't understand what. Anyone got any good advice?