Add the following line to the post build command list. It will publish the dll to the SharePoint site, reset IIS (clearing the cached object), and open IE.
xcopy "*.dll" "C:\Inetpub\wwwroot\wss\VirtualDirectories\80\bin\" /y
iisreset
"C:\Program Files\Internet Explorer\IEXPLORE.EXE" http://localhost/mydevsite/
Edit as needed.