SB allows you to pass addresses of functions/subs to other functions and call them implicitly within the function with ICALL. 
FUNCTION addone(x)
  addone = x + 1
END FUNCTION
FUNCTION x10(y)
  x10 = y * 10
END FUNCTION
FUNCTION printit(v,a)
  LOCAL r
  r = ICALL(a,v)
  PRINT r,"\n"
END FUNCTION
f1 = ADDRESS(addone())
f2 = ADDRESS(x10())
printit(1,f1)
printit(1,f2)
C:\scriptbasic\test>icall
2
10
C:\scriptbasic\test>