gdk_notify_startup_complete

[Andrew Shafer <shafer realmsys com>]

Does anyone understand how this works?

I want to be able to change the cursor on a launcher program until the
launchee finishes mapping its window.  

I'm looking for a code example or some direction to how to approach
this.  

(Or anyone who can offer insight into libstartup-notification will be my
hero)

Thanks in advance