Passing Controls to ActiveX Control

I have an ActiveX Control that was built with VB 5 (Ctrl1). It has a
property called GraphControl that is designed to be set to a graph control
(Graph1) that is on the parent. Then Ctrl1 can reference Graph1.

In VB this works fine. I simply put a graph control and Ctrl1 on a form. In
the Form.Load I have the following code.
  Set Ctrl1.GraphControl = Graph1.

The GraphControl property has Get and Set methods defined.
Delphi 2 Sees this as a Read only property and only generates the Get code
when installing it.

What code do I need to be able to set the property?

Any ideas are appreciated.

Paul Blanchard