Plugin takes care of requesting password from user for unpacking/testing archives.
Therefore the plugin must use function ArcGetPasswordProcW, passed into plugin by the program.
PK_CAPEX_CURFILE_ASK_PASS
2
Plugin may avoid passing file name inside archive for which the password gets entered to function ArcGetPasswordProcW. In this case, if the flag is set, the program may take the currently processed file. This influences correctness of messages
PK_CAPEX_ENCRYPTLIST
4
Plugin supports file list encryption.
PK_CAPEX_SOLID
8
Plugin supports continuous packing of multiple files (more effective than regular).