How to do the Zoom in / zoom out [Simlarly to Googles Aps ] concepts in Flex Application

[B.Praveen]

Hi
I have an Application which contain the Several Modules ; When we
zoom on that Application those Application Modules are visible
according to zooming (which their position only) ;
when zoom out those application modules are invisible(at particular
point only);

Similarly to Google Apps Application Type;