local hwnd = win.handle("c=TTOTAL_CMD")
local Panel = ifelse(tc.active(hwnd) == "left", 2, 3)
local TMP = childwin.handle(hwnd, "TMyPanel", Panel)
local TMTC = childwin.handle(TMP, "TMyTabControl")
local CurTab = win.sendmessage(TMTC, 4875, 0, 0)
win.sendmessage(TMTC, 4915, CurTab, arg(1))