[dev] How to get windows opened on one tag?

Hi list,

Sometimes I want to know all windows that I've opened on current tag, to
know if a window has opened and decide to find and switch to it, so my
question is how to get a list of opened windows names on current tag? The
statusbar shows only current focus window name.

-- 
Regards,
Yue Wu
State Key laboratory of Natural Products and Functions
Department of Traditional Chinese Medicine
China Pharmaceutical University(中國藥科大學)
No.24, Tongjia Xiang Street, Nanjing 210009, China