The integer value of this attribute specifies the trace to which all of the "Per Trace" attributes apply. Therefore, to set the attributes of an individual trace, you must first set the value of CURRENT TRACE to the number of that individual trace.
The value of CURRENT TRACE sets which trace is read or written by STATUS or CONTROL calls. If the value of CURRENT TRACE is 0 and then you set a "Per Trace" attribute with a CONTROL statement, the widget will set that attribute in all traces. If you try to get the value of any "Per Trace" attribute with a STATUS statement while CURRENT TRACE is 0, an error will be generated.
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