Hello,
Step1:Pls check Sharepoint as a default Template.(In professional version you can find this)
Go to File--New--> Project-->Check for Sharepoint.
If not you need to install the Sharepoint Template.
Step2:
*Go to File
*New-->
*Project-->
*Installed Templates-->
*Sharepoint -->
*Sharepoint 2010 VisualWebPart
*Click OK
MSDN LINK:
http://msdn.microsoft.com/en-us/library/vstudio/ee231554(v=vs.100).aspx[
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All the Best:) Write back if you need more info!