require 'quickfix_ruby'

def sendOrderCancelRequest
        message = Quickfix::Message.new()
        # BeginString
        message.getHeader().setField(Quickfix::StringField.new(8, "FIX.4.2"))
        # SenderCompID
        message.getHeader().setField(Quickfix::StringField.new(49, "TW"))
        # TargetCompID, with enumeration
        message.getHeader().setField(Quickfix::StringField.new(56, "TARGET"))
        # MsgType
        message.getHeader().setField(Quickfix::CharField.new(35, 'F'))
        # OrigClOrdID
        message.setField(Quickfix::StringField.new(41, "123"))
        # ClOrdID
        message.setField(Quickfix::StringField.new(11, "321"))
        # Symbol
        message.setField(Quickfix::StringField.new(55, "LNUX"))
        # Side, with value enumeration
        message.setField(Quickfix::CharField.new(54, quickfix.Side_BUY))
        # Text
        message.setField(Quickfix::StringField.new(58, "Cancel My Order!"))

        Quickfix::Session.sendToTarget(message)
end