Change menu text

[Leonardo Zide <leonardo centroin com br>]

  Hi,

  I'm writing an application that constantly changes the text of a menu
item but I couldn't find any functions to do that in the docs. Is there
a way to do this directly without having to remove the menu item and
adding a new one with a different text ?

Leonardo

PS: Sorry if this is a very stupid question but I'm new to GTK, I used
to work under MS Windows only.