searchstores <uses>,<effect>{,"<map name>"};

SEARCHSTORE_EFFECT_NORMAL : Shows the store's position on the mini-map and highlights the
shop sign with yellow color, when the store is on same map
as the invoking player.
SEARCHSTORE_EFFECT_REMOTE : Directly opens the shop, regardless of distance.
"this" : Will search for stores on the map where the invoking character is currently on. (default)
"all"  : Will search for stores on all maps.
// Item Vending_Search_Scroll (10 uses, effect: show mark on minimap, current map)
searchstores 10, SEARCHSTORE_EFFECT_NORMAL;
// Search stores (1 use, effect: open shop, all maps on the server)
searchstores 1, SEARCHSTORE_EFFECT_REMOTE, "all";