intn Hcache(int32 file_id, intn cache_switch)
file_id
IN:
File identifier returned by Hopen
cache_switch
Flag to enable or disable caching
Purpose
Enables low-level caching for the specified file.
Return value
Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
Description
If file_id is set to CACHE_ALL_FILES, then the value of cache_switch is used to modify the default file cache setting.
Valid values for cache_switch are: TRUE (or 1) to enable caching and FALSE (or 0) to disable caching.