to show semi-transparent object over playing video

I want to show a semi-transparent window (using
opengles and wince) over a playing video in the background (as done in
certain effects in Compiz). so I just want to draw a semi-transparent
object for this. I have few options for this:
(1) to show an object without showing the opengles window. Is it possible to do this ??
(2) Make the opengles window transparent and then show the object.
(3) Or shall i use the wince window itself to draw the opengles object??
Any suggestions will be greatly appreciated. Please can some1 help me by giving some inputs

Thanks for any help.
With Regards,

aditya.sen2009-11-26 07:36:13