How to make child widgets of a translucent window opaque

[Vinod Kumar <vinoddahiya gmail com>]

Hi,

  I need to make a top level popup window translucent but some of its
children to be opaque.
I made the toplevel window translucent with this fuction:

gtk_window_set_opacity(GTK_WINDOW(popup), 0.9);

But my problem is that all widgets inside it also becomes translucent,
but i want them to be opaque.

Is there any way to do that? I am using images in event-boxes as child
widgets.

Thanks,
Vinod