GTK+ window startup notification

[Binary Chen <binary chen gmail com>]

Hi,

I know in X there is a machnism called startup notification, one
"launcher" can listen to the various windowing message to draw a task
list window accordingly.

But I now use GTK+ on a different backend(directfb) which seems no
startup notification implemented, so I seek if the GTK+ has built in
this feature so I can listen to GTK application startup notification
message?

Thanks in advance.
Bin