Access; Mechanism; Called Routine Access Methods - Compaq TP Desktop Connector AA–PVNFG–TE Client Services Reference Manual

Table 1–2 (Cont.) Parameter Data Types
Data Type
longword
ptr
short
short int
unsigned long int
void *

1.3.2 Access

Access describes the way in which the called routine accesses the data specified
by the parameter. The access methods are described in Table 1–3.
Table 1–3 Called Routine Access Methods
Access Method
Read
Write
Modify

1.3.3 Mechanism

The parameter-passing mechanism is the way in which a parameter specifies
the data to be used by the called routine. The passing mechanisms are
described in Table 1–4.
Description
32-bit unsigned integer
Longword pointer to data buffer
Synonym for short int
16-bit signed integer
32-bit unsigned integer
Pointer to object of unknown type
Description
Data needed by the called routine to perform its operation is read
but not returned.
Data that the called routine returns to the calling routine is written
into a location accessible to the calling routine.
Data is both read and returned by the called routine; input data
specified by the parameter is overwritten.
Service Format 1–3