Peter Lindberg

Great, but the code only seems to work when I run it on my computer with Matlab installed. When I compile the code and run it with MCRInstaller, I guess It uses the original ftp code. Any tips, I've tried to copy the ftp.m code and rename it. Then including the renamed file when I compile, but I cannot use the function class(h,'ftp'). My guess is that ftp.m must be located in .../@ftp/
or?

ex: picture_walker('c:\Documents and Settings\user\My Documents\My Pictures\',200)

I've added a "add a new worksheet function":

WorkSheets = Excel.sheets;
message = struct('message',{''},'identifier',{''});

try
    Sheets = Excel.ActiveWorkBook.Sheets;
    target_sheet = get(Sheets, 'Item', sheetname);
catch %#ok<CTCH> Suppress so that this function works in releases without MException
    % Error if the sheet doesn't exist. It would be nice to create it, but
    % I'm too lazy.
    % The alternative to try/catch is to call xlsfinfo to see if the sheet exists, but
    % that's really slow.
    disp(['Sheet ' sheetname ' does not exist!']);
    Sheet = invoke(WorkSheets,'Add')
    Sheet.name = sheetname
    target_sheet = Sheet
end;

"Dynamic" sounds pretty unsuited for this submission since its use has meaning only to the Author.
It would take me less time to write down a query from the beginning than modifying the output of your fcn.
Not to count the time needed to read what the fcn actually accomplishes...