Knob Flags Knob flags specify characteristics of a knob. They are used in the flags field of a knob description structure.
Some flags describe the type of values a knob takes and others describe the user interface.
The knob value cannot be changed by the user or with a set knob call. Alter this knob only from foreground task time. The knob is first in some logical group of knobs. The knob value is a numerical value. The name of the knob is really a group name for display purposes.