C# Definition:

enum ThreadPriority
{
    THREAD_MODE_BACKGROUND_BEGIN = 0x00010000,
    THREAD_MODE_BACKGROUND_END = 0x00020000,
    THREAD_PRIORITY_ABOVE_NORMAL = 1,
    THREAD_PRIORITY_BELOW_NORMAL = -1,
    THREAD_PRIORITY_HIGHEST = 2,
    THREAD_PRIORITY_IDLE = -15,
    THREAD_PRIORITY_LOWEST = -2,
    THREAD_PRIORITY_NORMAL = 0,
    THREAD_PRIORITY_TIME_CRITICAL = 15
}

VB.NET Definition:

Enum ThreadPriority
    THREAD_MODE_BACKGROUND_BEGIN = &H10000
    THREAD_MODE_BACKGROUND_END = &H20000
    THREAD_PRIORITY_ABOVE_NORMAL = 1
    THREAD_PRIORITY_BELOW_NORMAL = -1
    THREAD_PRIORITY_HIGHEST = 2
    THREAD_PRIORITY_IDLE = -15
    THREAD_PRIORITY_LOWEST = -2
    THREAD_PRIORITY_NORMAL = 0
    THREAD_PRIORITY_TIME_CRITICAL = 15
End Enum