How to connect an outlet to a controller(conmponent in a window or panel) manually?

[David T. Shen]

I want to connect an outlet to a textField controller/component in a
window/panel,
I declare an outlet in .h file as blow:
------------------------
  id txtInfo;
-------------------------
and here is the action for a button:
------------------------
-(void) OKAction : (id) sender;
----------------------------

In the implement's OKAction, I want to change the txtInfo's string:

[txtInfo setStringValue: @" ..... " ];

----

How can I connect the textField component to the outlet -- txtInfo --
manually, and the action can visit the outlet?

Thanks in advance!
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