Who clicked me?

function serverCmdequipItem(%client, %item)
{
   if (%item $= "") {
      messageClient(%client, 'MsgItemPickup', '\c0No item selected');
      return;
   }

   %client.getControlObject().use(%item);
   // can I get this use(%item) call into the GUI button function below?

}

function inventoryGui::buttonEquip()
{
   // equip the selected item to the relevant mount point
   // for now this is only weapons
   //
   // $lstInventoryitem is the item datablock name got from a
   // GuiTextListCtrl inventory listing when the item is selected
   // in the list

   commandToServer('equipItem', $lstInventoryitem);

   // can I call use($lstInventoryitem) here?
   // maybe LocalClientConnection.getControlObject();
   // but that did not seem to work :(
   // ??
}