Alef T Veld wrote: >I think that's fixed. >But what does > >gboolean gtk_calendar_mark_day (GtkCalendar *calendar, > guint day); > >want for day? a tstruct->tm_mday or a &tstruct->tm_day ? > Value, not a pointer: tstruct->tm_mday. 'guint' type means: 'unsigned int'. With '&' operator you're getting a pointer in C, so &tstruct->tm_mday is of type 'int*'. Olexiy