Generating key press event using gtk button

[Sulabh Bista <sul4bh gmail com>]

Dear all:

I am trying to write a virtual keyboard like application that can generate
keyboard key press event on click of a button. How do I make a "button
click" generate a "key press" event ?

An example of such program is xvkbd (http://homepage3.nifty.com/tsato/xvkbd/
).

Regards,
Sulabh Bista