Silverlight 5 RC (Release Candidate) has been already released. There are some new features already included in this build. Among them, one most important feature is PInvoke. PInvoke means Platform Invoke. By using this, you can directly talk to system resources without using COM APIs. In this article, we will explore it more and show you how to open the "Run Dialog" directly from the Silverlight 5 application. Here also, we will use In-Browser application which you can easily port to Out-Of-Browser.