For use of all the list depending functions
struct ListInfo{
USHORT LeftEdge, TopEdge, Width, Height;
USHORT ItemHeight;
USHORT ScrollID, ListID, ClickUpID, ClickDownID;
USHORT BorderPen, FillPen;
struct ListItem *TopItem, *TopDisplayItem, *ActiveItem;
struct Window *Window;
struct Gadget *ScrollGadget, *ListGadget,
*CkickUpGadget, *ClickDownGadget;
void (*Drawroutine)();
USHORT OldL, OldT, OldW, OldH
};