dbrpdb(device_index.i4.r, property_index.i1.r, work_area.i1a.r,
	       retrieval_index.i2.r, error.i2.r)

	This routine adds a request for the Process Data Block (PDB) for
	a specified device and property.  The Process Data Block (PDB)
	contains the information used with the scaling and masking data
	service routines.

	device_index	device index
	property_index	property index (constants are in dbprops)
	work_area	database work area array initialized by DBWAIN call
			in which the request list is being built
	retrieval_index	retrieval index for the returned data.  This value
			must be saved for calls 'dbget(i)'.
	error		standard ACNET error/success return

	This function requires the following include files:

	dbprops_h, clib_h

	Related functions:

	dbwain, dbproc, dbreq, dbget, dbgeti, dbareq, dbrdi, dbrmc, dbsize