flushing a buffer

["Nagender B. Reddy" <nagender cs ucsb edu>]

hello,
 for a button handler, I wrote a code which runs in infinite loop and adds 
some text to the buffer. But unless the handler exits, the buffer is not 
being flushed to the GUI. Can any one tell me if there is any way in which 
we can flush the buffer??? From the API of gtk_text_buffer I cudnt find a 
function for this??

Thanx,
Nagender