Priority Class Enum
Indicates the priority that the system associates with a process. This value, together with the priority value of each thread of the process, determines each thread's base priority level.
public enum class ProcessPriorityClass
public enum ProcessPriorityClass
type ProcessPriorityClass =
Public Enum ProcessPriorityClass
Specifies that the process has priority higher than
Specifies that the process has priority above
Specifies that the process performs time-critical tasks that must be executed immediately, such as the
Specifies that the threads of this process run only when the system is idle, such as a screen saver. The threads of the process are preempted by the threads of any process running in a higher priority class. This priority class is inherited by child processes.
Specifies that the process has no special scheduling needs.
Specifies that the process has the highest possible priority.
A process priority class encompasses a range of thread priority levels. Threads with different priorities running in the process run relative to the process's priority class. The operating system uses the base-priority level of all executable threads to determine which thread gets the next slice of processor time.
Win32 uses four priority classes with seven base priority levels per class. Based on time elapsed or other boosts, the operating system can change the base priority level when a process needs to be put ahead of others for access to the processor. In addition, you can set PriorityBoostEnabled to temporarily boost the priority level of threads that have been taken out of the wait state. The priority is reset when the process returns to the wait state.