SmartMem        Functions
 h_free_mem()    Returns total heap free memory.
 h_graph()       Show graph of free pool.
 h_graphs()      Returns h_graph display as a string
 h_hotkey()      Demonstrates h_graph() SET KEY usage.
 h_maxblock()    Returns the size of biggest heap block
 h_memory()      Get free memory down to block size
 h_pack()        Pack Clipper's free memory pool
 h_rept()        List memory blocks in Clipper's heap
 h_tot_mem()     Get total heap memory
 h_used_mem()    Returns total used memory reported by a heapwalk.
 h_walk()        Traverse heap memory.