URGENT: gtk_hscale_new_with_range

[Matteo Frigerio <drhammerit yahoo it>]

hello, i have a problem with gtkhscale. I need a
hscale with step increment of 0.25. I use this code:

gtk_hscale_new_with_range((gdouble)0,(gdouble)5,(gdouble)0.25);
  
but the hscale always increment 1 step. If i use mouse
of arrows it always increment by 1. What i have to do
for increment by 0.25 ?

thanks
  dr hammer

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