GPIB__GetInstrumentCount (ul_pbar_gpib)

 *  Synopsis:
 *    #include <ul_pbar_gpib:gpibdir.h>
 *
 *    int GPIB__GetInstrumentCount( const char *instrumentType )
 *
 *  Function intent:
 *    GPIB__GetInstrumentCount() returns the number of instruments of the
 *    specified type found in the instrument directory.
 *  Function parameters:
 *    instrumentType	instrument type code string (e.g., NA, SA, OS, VM)
 *                        Use "**" to match any instrument type
 *                        (KTYPE_LENGTH characters)
 *  Function return value:
 *    count of instruments of the given type