How to implement a matlab GUI interface?

Hello,

I have a question. Say I have 5 images and I have designed a GUI interface to view all those images. I want to implement a slider that would help me to browse the images one by one. I have written the following code but it is not executing:-

    for i=1:2
                    filename= strcat(int2str(i),'.bmp');
                    filename=fullfile(directoryname,filename);
                    I=imread(filename);        
  % Create a scroll panel for left image
  hSpL = imscrollpanel(I);
  set(hSpL,'Units','normalized',...
      'Position',[0 0.1 .5 0.9])

% Create scroll panel for right image
hSpR = imscrollpanel(I);
set(hSpR,'Units','normalized',...
    'Position',[0.5 0.1 .5 0.9])

% Add a Magnification box 
hMagBox = immagbox(I);
pos = get(hMagBox,'Position');
set(hMagBox,'Position',[0 0 pos(3) pos(4)])

%%Add an Overview tool
imoverview(hImL) 
 end

Please help

[Walter Roberson]

Is it giving an error message?