Thanks for your reply. 

Not exactly what I'm looking for but it's a great tip as starting point . Thanks Chris

Thanks for your reply

You can do SDI with PowerServer.  As Chris mentioned, the window opens outside of the Web browser.

Hi Alessandro;

  Here is an example of a web App that I built for Passport Canada that looks like a modern SDI App in the web browser but it's all built using one MDI Frame.

Here is how I did it ...

https://sourceforge.net/projects/stdfndclass/files/Presentations/Webifying/

Regards ... Chris

ok. I understand this but :

1. Some features for MDI are too OLD STYLE! 

2. I Need to use the background area as a container for dynamic dashboard ( with MDI i can't)

 3. Width MDI I must Use a menu and i don't wat to see a menu un top.

In few words i dont't want a web application like a WINXP application and with SDI i'm free to build a lot of customized object for my application 

Hi Alessandro;

   Tip:  With PowerServer Web, you must use an MDI Frame window as your SDI base App window so that the App remains inside the Web Browser.  ;-)

Regards ... Chris