program sleep question

["Fox, Kevin M" <KMFox mail bhi-erc com>]

Is there an equivalent gtk function to the sleep function that sleeps and
still allows gtk to refresh itself, and if not, why not?
 
I am working on a program that has an opening splash screen similar to the
gimp's. I need to sleep(2) so that the user can have a chance to see the
text before going to the next line in the function, but the program dosnt
refresh itself for 2 seconds because of the sleep...