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070-504 Real Exam Dumps DEMO
Question 1: QuestionYou create a Windows Workflow Foundation application by using Microsoft .NET Framework 3.5.
A Windows Forms application functions as the workflow host by using the
DefaultWorkflowSchedulerService.
You create a WorkflowRuntime instance in the Load event of the forms. You also subscribe to the
WorkflowCompleted event.
You need to ensure that the application displays the message in the Label control named lblStatus when
the WorkflowCompleted event is raised.
Which code segment should you use?
A. Private Sub UpdateInstances(ByVal id As Guid)
??If Me.InvokeRequired Then
????lblStatus.Text = id.ToString & " completed"
??End If
End Sub
B. Private Sub UpdateInstances(ByVal id As Guid)
??If (Not Me.InvokeRequired) Then
????lblStatus.Text = id.ToString & " completed"
??End If
End Sub
C. Private Delegate Sub UpdateInstancesDelegate(ByVal id As Guid)
Private Sub UpdateInstances(ByVal id As Guid)
??If Me.InvokeRequired Then
????Me.Invoke(New _
?????UpdateInstancesDelegate(AddressOf UpdateInstances), _
?????New Object() {id})
??Else
????lblStatus.Text = id.ToString & " completed"
??End If
End Sub
D. Private Delegate Sub UpdateInstancesDelegate(ByVal id As Guid)
Private Sub UpdateInstances(ByVal id As Guid)
??If Not Me.InvokeRequired Then
????Me.Invoke(New _
????UpdateInstancesDelegate(AddressOf UpdateInstances), _
????New Object() {id})
??Else
????lblStatus.Text = id.ToString & " completed"
??End If
End Sub
Correct Answer: C
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