How to check security role of a user in crm 4.0?

How can I check user's role in w开发者_如何学运维orkflow? I have a workflow it will send a mail to users if owner of created entity does not have sales manager role.

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I assume this is a continuation of:

{Microsoft CRM 4.0} How to send e-mail to some users who has salesperson security role

What trouble are you having? What have you tried? Can you provide what code you've written for your workflow activity so far?