License ocx problem

We made an ocx that also embed ocx controls. Those embedded controls are licensed. For that we set the property "Require license key' of our ocx control.
Another supplier wants to use our control, but they create the control dynamically. They have not the possibility to use the method License.add. They are not programming in VB of VC.
Their environment is on a windows platform.
They now can not run their application with our control, because not the proper license is set. When we make a VB application with the License.add method included everything works fine.
Is there another way to get this control work in another develop environment?

Regards,

Maurice