How to Use MS WorkFlow Sample Exmaple For Sending Mail

Question

Hi,
This Is UmmidiKondababu, From hyderabad.
Actually Am New To Windows Workflow Fundation . We just Started To develop Some Tasks In Windows Workflow .we are Working On Workflow Since Last Two Weeks.So I got Basic Things About Windows WorkFlow.
I want Sendmail For Approval Process:
1)I downloaded WF_WCF_Samples
2)I want Use Sending Mail Example
3)Finally , My question is What Are Changes I shoul made To your example while sending email.
like some from,to,host,port,username these details should changes,but i want know exactly where i should change , what more details i should for running your solution