An outlet connections lets two objects can communicate with each other by sending messages. The object that sends messages contains a reference to the other object in an instance variable.
Generally, you connect an object in the icon mode of the Instances display of the nib file window to an object on the interface.
You can also connect two objects in the Instances display of the nib file window.
When you use the outline mode of the Instances display of the nib file window, you can connect any two objects within the nib file window, even if one of them is an object in your interface.
Make sure you connected the correct object and that you didn't, for example, connect to a form when you meant to connect to an item within the form.
Action connections let an object in your interface can send action messages to another object. Action messages are sent whenever a user presses a button, selects a menu item, or manipulate an control object on your interface in any other way.
Generally, you'll connect an object in your interface to an object in the icon mode of the Instances display of the nib file window.
You can also connect two objects in the interface.
When you use the outline mode of the instances display of the nib file window, you can connect any two objects within the nib file window, even if they're in your interface.
Make sure you connected the correct object and that you didn't, for example, connect to a form when you meant to connect to an item within the form.