OSI/AS Programming Manual

APS_DATA_GETPARAM_
APS Procedure Calls
3–66 056783 Tandem Computers Incorporated
To find out the size of the user-data parameter (including ZAPS-DDL-DATA-
HDR and all occurrences of ZAPS-DDL-DATA-ELEMENT-HDR) without
retrieving any data, call APS_DATA_GETPARAM_ with both
data-buffer-size and start-position set to 0. The API returns the size
of the user data, using the more-data parameter.
User data is available in the API internal data area until you call one of the
following:
A procedure that invokes a primitive
APS_EVENT_RECEIVE_ or MFM_AWAITIOX_