Script Function: Q49W

 function int Q49W(obj Q4XN, obj Q5KD, obj Q5KC, int Q5NM)
 {
   if (Q5KC == NULL())
   {
     return (0x00);
   }
   if (Q50O(Q4XN))
   {
     if ((!isEquipped(Q4XN)) || (containedBy(Q4XN) != Q5KD))
     {
       systemMessage(Q5KD, "You must equip this item to use it.");
       return (0x00);
     }
   }
   return (Q49V(Q5KD, Q5KC, Q5NM));
 }