Main GUI dissapears when another pops up and how to print onto the GUI?

[EDIT: Fri May 13 03:00:26 UTC 2011 Reformat - MKF]

Hello,

I have the GUI code below:

function varargout = User_Interface(varargin)

...

function User_Interface_OpeningFcn(hObject, eventdata, handles, varargin)

handles.val = 1;

...

function radiobutton1_Callback(hObject, eventdata, handles)

 if(get(hObject,'Value')== 1)

     handles.val = 1;

    % Save the handles structure.

    guidata(hObject,handles)

 end

function radiobutton2_Callback(hObject, eventdata, handles)

 if(get(hObject,'Value')== 1)

    handles.val = 2;

    % Save the handles structure.

    guidata(hObject,handles)

 end

function radiobutton3_Callback(hObject, eventdata, handles)

if(get(hObject,'Value')== 1)

    handles.val = 3;

    % Save the handles structure.

    guidata(hObject,handles)

end

function pushbutton1_Callback(hObject, eventdata, handles)

switch(handles.val)

    case 1

        InputOneImage
 %This is a name of a file
    case 2

        InputMultipleImages
 %This is a name of a file
    case 3

        Leukemia
 %This is a name of a file
end

When i run it, there are two problems:

1) On one of the files i call, there is something that looks like this:

directory = uigetdir;

The small GUI that pops closes my main GUI. I would like to keep the main GUI open. How can i do that

2) I basic of using 'static text' but, i really don't know how to print something on the GUI as the program is running. I would like to print something like this on my GUI:

starting stage one

starting stage two

...

and so on

Thank you for your help

[Arturo Moncada-Torres]

Regarding Question 1, could you provide more information? Where is it called, what do you do before, etc.