RunAsUser DLL can be used by developers whose software needs to execute an application in the security context of a certain user. RunAsUser DLL is a Dinamic Link Library (DLL) which allows creating processes as a user while another user is logged on to the system. RunAsUser DLL performs all the necessary actions required to run the program such as logging on a user into the system, providing access to desktop, loading user profile, creating a process on the specified terminal session, etc. The program also supports passwordless logging into the system (ZwCreateToken/NtCreateToken), creating processes as LocalSystem and with a username of a user that is working in the system at the moment. RunAsUser DLL supports all 32 and 64-bit platforms based on Windows NT including Windows NT 4.0, 2000, XP, 2003, 2008 and Vista.