Set the application always on top

[MONDON Daniel]

Hi,

I am looking for an X command (?) to set my program on top level.

In fact, this is a SplashScreen shown during transition between two
program execution : in order to mask windows during closing and loading.

Can i do that with an X command (1.7.6 with ubuntu 10.04 or 1.7.7 with
TCL) ?
Or have i to do with a specific program ?

I'm open to any suggestion!

Thanks
Daniel.