The new compression level will only apply to newly written objects. A new key is created in the KEYS linked list for each object. The directory header info is rewritten on the directory header record. The linked list of FREE segments is written. This is the basic low level write operation.
Returns kTRUE in case of failure.
The returned type of TFile depends on the file name. However, before opening a file via TNetFile a check is made to see if the URL specifies a local file. If that is the case the file will be opened via a normal TFile . Interface to system open. Interface to system close.