How can I work on a .fig file?

I have a folder with lets say 20 .fig files and I want to do some changes on it. how should I do that? how should I ask user for a path to the folder?

here is my code so far:

function modifier
%myfolder=input('please add path');
myfolder='C:\Documents and Settings\Administrator\My Documents\MATLAB';
figfiles=dir(fullfile(myfolder,'*.fig'))
a=input('please enter [width(x),aspect ratio(x/y),resolution]');
for i=1:length(figfiles)
  %openfig('figfiles(i)');
  set(gcf,'paperpostionmode','manual');
  set(gcf,'paperunits','centimeters');
  set(gcf,'paperposition',[.25 .25 a(1) a(1)*(1/a(2))]);
  print -r300
  set(gca,'fontsize',11);
  set(findall(gcf,'type','text'),'fontsize',11);
  save('dcs','*.png');
end
end

thanks