Link a task to another task

[Guest]

I want to create a task from an opportunity form (really a task form) and
link the new task back to the opportunity. I want to create a button on the
opportunity form that will open a new task form and set a field value (parent
value) that can be used to link back to the orriginal opportunity form.

 

[Guest]

How about having the code behind the button create the Task Item, and then
set the value of the opportunity form's EntryID property to a custom field
(or an infrequently used field like Role) in the new Item. Then have a
button on the new form open that item from the GetItemFromID method.