Attaching a program to a user decision step in sap workflow

Hi All,

I have a requirement and thats as follows.

When we click a button in the Tcode CC01, a new screen will be displayed.

We need to attach a link to that screen in the user decision step in the workflow.

When the user gets the workitem and click on that link, that screen needs to be displayed.

For this purpose, I have created a BDC program in order to call that screen involved in the CC01 main screen.

Now, I need to attach this to the work item.

Please help me on this.

Thanks in Advance.