Download visio premium 2010 at http://technet.microsoft.com/en-us/ee390821.aspx
Open visio | double click to Microsoft Sharepoint Workflow
User interface as follows:
Drag and drop Start and Terminate control as follows
Drag and drop some control
Connect controls together
After connect, UI as follows:
At Process Tab | Check Diagram
Check success
Export visio
Save file
Open sharepoint designer 2010...
