How to take in handle to pre-existing object using GUI/GUIDE?

I'm working with GUI/GUIDE where I have created a GUI that lets me edit the properties of an object of a class I created called "Task" using some text boxes. When I create a "Task" object within GUIDE the GUI works as expected. My problem is that I am unable to take in a pre-existing object and edit in my GUI. How do I take in a handle to a pre-existing object?

Answer 1

[Image Analyst]

See if the FAQ helps: http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.28s.29.3F