How do I use matlab GUIDE to produce a GUI modal dialog that records user inputs to be used later?

I am new to using the matlab GUIDE. I know there are some predefined dialog boxes such as inputdlg and msgbox and warndlg and so on and so forth that can easily be implemented into the command line without having to play around with too many things.

However, I was wondering whether it was possible to modify inputdlg in matlab guide? I am just trying to produce a simple dialog box that reads the user input and when the user clicks ok, it closes and records the inputs somewhere. Using inputdlg it is very easy to do so:

    uiwait(msgbox(sprintf('Please enter your new references for each electrode.')));
    prompt = {'Fp1','Fp1','F7','T3','T5'};
    dlg_title = 'Input references';
    num_lines = 1;
    answer = inputdlg(prompt,dlg_title,num_lines );

The user enters a string for each option 'Fp1', 'F7' and so on and all these answers are recorded in "answer".

Now I have 2 problems:

 1. I have 16 such inputs and if I put them all inside the same "prompt" then the dialog box runs off the screen - so I use prompt, prompt2 and prompt3 to split them up and record the answers. It works fine, but it would be better if I could arrange the input boxes side by side as you can edit/drag inside the matlab guide.

 2. I want my dialog box to look as it does in this picture with the minus sign between the 2 cells where the user will enter something into both boxes. The first box in each line is actually equivalent to the prompt that I have specified above, but in this case the user will enter the string into the first cell rather than being prompted for it.

But I can't seem to figure out how to do this either using inputdlg itself and altering its properties or using guide to create a custom inputdlg.

Currently I am able to run my code such that it stores the input of the callback function to a variable, using these lines in the callback function area for the edit boxes. But I am wondering if I will have to individually program every single edit box?

    input = get(hObject, 'String')
    display(input)
    assignin('base','input',input);

    % Save the value
    handles.trial = input
    guidata(hObject,handles)

However, with my current situation I have around 32 edit boxes and I want to store all their answers within one array, which doesn't seem possible at the moment. Is there a way to program this so that each input from an edit box is appended to the same array?

I have tried to proceed as

    input = get(hObject, 'String')
    A(1,:) = input
    assignin('base','A',A(1,:));

but in this case it returns A as a cell which has the value entered in the last edit box.

Can anyone help?

Thanks.