The module contained in the DevExpress.ExpressApp.Workflow.v18.1.dll assembly.
The Workflow Module comprises two assemblies:
Contains base classes and services that are used in all workflow-enabled XAF applications.
This assembly represents a module, since it contains the WorkflowModule class - a descendant of the ModuleBase class.
Contains classes that are only required in Windows Forms applications.
This assembly represents a module, since it contains the WorkflowWindowsFormsModule class - a descendant of the ModuleBase class.
The WorkflowModule class exposes properties whose values determine the general behavior of the workflow functionality. To customize these properties, select the WorkflowModule component in the Application Designer's Modules section, and use the Properties window.