Compaq TP DESKTOP CONNECTOR AAPVNFGTE - Manual (Page 74)

acmsdi_write_msg
call_id
Type: ACMSDI_CALL_ID
Access: read
Mechanism: by reference
The call identification returned by the acmsdi_call_task service which initiated
the ACMS task associated with this exchange.
call_context
Type: void *
Access: read
Mechanism: by value
Application-specific context for the call. This is the same context that was
passed by the application to the acmsdi_call_task service which initiated the
ACMS task associated with this exchange.
Return Status
This function returns a ps32, defined in ACMSDI.H to be equivalent to a
signed 32-bit integer. The value must be a valid TDMS status code. Valid
TDMS statuses are defined in TDMS.H.
3–24 Portable API Presentation Procedures