The FIX Data Dictionary in QuickFIX contains Messages and Fields (among other things).
To add Messages you must add the message between the <messages></messages>
tags like this:
<message name="CoolMessage" msgcat="app" msgtype="xCM">
<field name="Currency" required="N"/>
<field name="Text" required="N"/>
<field name="Account" required="Y"/>
</message>
And then add the new msgtype
to the MsgType
field in the <fields></fields>
section like this:
<field number='35' name='MsgType' type='STRING'>
...
<value enum='xCM' description='COOLMESSAGE'/>
</field>
If you want to add new fields, just add them between the <fields></fields>
tags like this:
<fields>
<field number="1" name="Account" type="STRING"/>
<field number="2" name="AdvId" type="STRING"/>
<field number="3" name="AdvRefID" type="STRING"/>
...
<field number="9006" name="AwesomeField" type="STRING"/>
</fields>
This and more information can be found in this tutorial.