Is that possible build XOML workflow without visual studio?

we want to build a workflow desinger based on Microsoft WF engin,
which allow customer to build some simple workflow using our application.
So, is that possible we set make activities, the customer can add states, events, bring then together,
and we make a XOML file based on there settings, and then compile it to dll, add to the application
can some one provide some material about this
Tom, kushals... Help

Thanks