gtk and xvkbd

[Jeff Moser <jmoser www-data com>]

I have a GtkEntry object that I want to populate using the on-screen
keyboard xvkbd. I'm using php_gtk. I have lots of php experience, but
this is my first project with gtk and xvkbd. 

I can get the keyboard to show up using exec, but it locks up the
window. 

Has anyone had any experience doing this? Any help is appreciated.