Step 2: Specifying the Workflow-Identifying Field in the Workflow

In this step, you will extend the screen configuration of the Repair Work Orders (RS301000) form and specify the workflow-identifying field in it by calling the FlowTypeIdentifierIs method.

Do the following:

In the extension library, create an extension of the RSSVWorkOrderEntry_Workflow class as shown in the following code.
```
    public class RSSVWorkOrderEntry_Workflow_Extension :
        PXGraphExtension<RSSVWorkOrderEntry_Workflow, RSSVWorkOrderEntry>
    {
    }
```
Tip:
Use Acuminator to suppress the PX1016 error in a comment. In this course, for simplicity, the extension is always active.

In the RSSVWorkOrderEntry_Workflow_Extension class, define the set of constant string values and corresponding classes for the value of the UsrOrderType field which as the following code shows.

        #region Constants 
        public static class OrderTypes
        {
            public const string Simple = WorkOrderTypeConstants.Simple;
            public const string Standard = WorkOrderTypeConstants.Standard;
            public const string Awaiting = WorkOrderTypeConstants.Awaiting;

            public class simple : PX.Data.BQL.BqlString.Constant<simple>
            {
                public simple() : base(Simple) { }
            }

            public class standard : PX.Data.BQL.BqlString.Constant<standard>
            {
                public standard() : base(Standard) { }
            }

            public class awaiting : PX.Data.BQL.BqlString.Constant<awaiting>
            {
                public awaiting() : base(Awaiting) { }
            }
        }
        #endregion

In the RSSVWorkOrderEntry_Workflow_Extension class, override the Configure method as the following code shows.

        public sealed override void Configure(PXScreenConfiguration config)
        {
            Configure(config.GetScreenConfigurationContext<RSSVWorkOrderEntry,
                                                           RSSVWorkOrder>());
        }

        protected static void Configure(WorkflowContext<RSSVWorkOrderEntry,
                                                         RSSVWorkOrder> context)
        {
        }

In the static Configure method, update the screen configuration and specify the workflow-identifying field as the following code shows.
```
            context.UpdateScreenConfigurationFor(screen => screen
                .FlowTypeIdentifierIs<RSSVWorkOrder_Extension.usrOrderType>());
```
Save your changes.