Sample Download : http://code.msdn.microsoft.com/CppUACSelfElevation-5bfc52dd
User Account Control (UAC) is a new security component in Windows Vista and newer operating systems. With UAC fully enabled, interactive administrators normally run with least user privileges. This example demonstrates how to check the privilege level of the current process, and how to self-elevate the process by giving explicit consent with the Consent UI.
For detailed introduction of the sample, please read the documentation at http://code.msdn.microsoft.com/CppUACSelfElevation-5bfc52dd
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This describes itself as being able to "self-elevate the process", however all it really does is to start another instance of itself (elevated) and then close down the current instance. i.e. it calls ShellExecuteEx with the "runas" verb.