How to access the Link Contraint Interface?

[Anonymous]

Hi, how can I access the Link Constraint controller on a object?

I try using the ILinkCtrl class but with no success.
Here's what the documentation say about it:

This class represents the interface to the Link Controller. 
You can obtain a pointer to the link controller interface using; GetLinkConstInterface(cd). 
This macro will return:
(LinkConstTransform*)(CD)->GetFPInterface(LINK_CONSTRAINT_INTERFACE).

However, the class LinkConstTransform is not declared anywhere in the sdk. 😐
I however found it in "\maxsdk\samples\controllers\Link_cnstrnt.h".

Does anyone have a hint?
I'm using 3dsmax 2010 sdk.

[Anonymous]

Ok I found it, my error was to try to call GetInterface on a INode* instead of a Control*.

ILinkCtrl* pILinkCtrl = (ILinkCtrl*)_pNode->GetTMController()->GetInterface(LINK_CONSTRAINT_INTERFACE)