TDS640__IsTriggered (ul_pbar_instruments)

 *  Synopsis:
 *    #include <ul_pbar_instruments:tds640.h>
 *
 *    int TDS640__IsTriggered( const CTDS640ptr tds640Ptr )
 *
 *  Function intent:
 *    TDS640__IsTriggered() returns true if the TDS 640 has seen a trigger since
 *    last armed.  If an I/O error occures during the GPIB read the routine
 *    returns FALSE.
 *  Function parameters:
 *    CTDS640ptr	tds640Ptr	Valid TDS 640 module pointer
 *  Function return value:
 *    TRUE		TDS 640 has been triggered
 *			  Note: returns TRUE if I/O error occurs during check
 *    FALSE		TDS 640 has not been triggered