Open A Window Without Wintext

[I_AM_BACK_2222]

i need to know how to put (VK_DOWN) or navigate(,d) to change the room if you know what i meen :>
so how would i put that in this crypt

Acc a=acc("" "LISTITEM" win("Chat Lobby" "#42684") "SysListView32" "" 0x1031)
a.Selection()
if(findrx( a.Description "People/MostAllowed: 10/10" 0 2))
,a.DoDefaultAction