GPIB__Clear (ul_pbar_gpib)

 *  Synopsis:
 *    #include <ul_pbar_gpib:gpib.h>
 *
 *    int GPIB__Clear( const CGPIBptr modulePtr )
 *
 *  Function intent:
 *    GPIB__Clear() selects the specified GPIB module if not currently selected,
 *    and performs a GPIB Selective Device Clear (SDC).
 *  Function parameters:
 *    CGPIBptr	modulePtr	The unique GPIB module I/O control pointer
 *                              returned by GPIB__InitializeModule().
 *  Function return value:
 *    CBS_OK		command successfully written
 *    CBS_INVARG	invalid device address or
 *  			VME interfaced device selected or
 *			module pointer
 *    otherwise		GAS error