Get input from user using Popup button

I have a popup button having multiple options. One of them is to get input message from user (screenshot attached). I want to click this button and enter message in below given box. Then I need to call this message in another function.

I have written this code to get the message from that box:

  message=get(handles.edit3,'string');
  handles.message=message;

and this line in the function to call this message where I need it.

  message=handles.message;

but it seems that the message remains always empty and not getting that value.

Please, help how can I solve it?

[Zeeshan Abbas]

The issue was that the message is in the form of cell array so I converted into char first and it worked.

So, am closing this question.