@Shahar I do not know what Windows MSN is using but Pidgin is open-source and is successful at sending this flag. I'm no developer but it seems to me this could be figured out from the pidgin/libpurple source code.
@Shahar
I do not know what Windows MSN is using but Pidgin is open-source and is successful at sending this flag. I'm no developer but it seems to me this could be figured out from the pidgin/libpurple source code.