Arguments |
Description |
---|---|
ctx1 |
Optional pointer to a caller-supplied context or other data type. This pointer will be passed as the ctx1 argument to the caller-supplied routines process_message and process_done. A value of NULL may be passed for this argument. |
process_message |
The address of a caller-supplied routine to process each message. |
process_done |
Optional address of a caller-supplied clean up routine. A NULL value may be passed for this argument. |
item_code |
An optional list of item codes. See the description section that follow for a list of item codes. The list must be terminated with an integer argument with value 0. |