Arguments

 

request_id

   OpenVMS usage:address
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference
   Request identifier supplied by the symbiont to the user routine
   currently calling PSM$READ_ITEM_DX. The symbiont always supplies
   a request identifier when it calls a user routine with a service
   request. The request_id argument is the address of a longword
   containing this request identifier value.

   Your user routine must copy the request identifier value that the
   symbiont supplies (in the request_id argument) when it calls your
   user routine. Then, when your user routine calls PSM$READ_ITEM_
   DX, it must supply (in the request_id argument) the address of
   the request identifier value that it copied.
 

item

   OpenVMS usage:longword_unsigned
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference
   Item code that identifies the message item that PSM$READ_ITEM_DX
   is to return. The item argument is the address of a longword that
   specifies the item's code.
 

buffer

   OpenVMS usage:char_string
   type:         character string
   access:       write only
   mechanism:    by descriptor
   Buffer into which PSM$READ_ITEM_DX returns the specified
   informational item. The buffer argument is the address of a
   descriptor pointing to this buffer.

   The PSM$READ_ITEM_DX routine returns the specified informational
   item by copying that item to the buffer using one of the
   STR$COPY_xx routines documented in the OpenVMS RTL String
   Manipulation (STR$) Manual.