NtOpen

NtOpen is a system call in the Windows NT operating system, part of the Native API, which provides a low-level interface to the operating system's kernel. It is used to open a handle to an object managed by the Windows Executive, such as files, processes, threads, and other system resources. The function is typically used by system-level applications and drivers that require direct access to these resources.

The NtOpen function is called with a specific object type and a set of desired access rights. The function returns a handle to the object if the call is successful, or an error code if the operation fails. The handle can then be used in subsequent system calls to interact with the object.

NtOpen is a powerful and flexible function, but it also requires a deep understanding of the Windows NT architecture and the specific object types it manages. Improper use of NtOpen can lead to system instability or security vulnerabilities. As such, it is primarily used by developers who are familiar with the intricacies of the Windows NT kernel and its object model.