For Delphi

 { Contents of file wcxhead.pas }
 { It contains definitions of error codes, flags and callbacks }
 
 unit wcxhead;
 
 interface
 
 const       {Error codes returned to calling application}
   E_END_ARCHIVE=     10;       {No more files in archive}
   E_NO_MEMORY=       11;       {Not enough memory}
   E_BAD_DATA=        12;       {Data is bad}
   E_BAD_ARCHIVE=     13;       {CRC error in archive data}
   E_UNKNOWN_FORMAT=  14;       {Archive format unknown}
   E_EOPEN=           15;       {Cannot open existing file}
 
   E_ECREATE=         16;       {Cannot create file}
   E_ECLOSE=          17;       {Error closing file}
   E_EREAD=           18;       {Error reading from file}
   E_EWRITE=          19;       {Error writing to file}
   E_SMALL_BUF=       20;       {Buffer too small}
   E_EABORTED=        21;       {Function aborted by user}
   E_NO_FILES=        22;       {No files found}
   E_TOO_MANY_FILES=  23;       {Too many files to pack}
   E_NOT_SUPPORTED=   24;       {Function not supported}
 
   {Unpacking flags}
   PK_OM_LIST=           0;
   PK_OM_EXTRACT=        1;
 
   {Flags for ProcessFile}
   PK_SKIP=              0;     {Skip file (no unpacking)}
   PK_TEST=              1;     {Test file integrity}
   PK_EXTRACT=           2;     {Extract file to disk}
 
   {Flags passed through ChangeVolProc}
   PK_VOL_ASK=           0;     {Ask user for location of next volume}
   PK_VOL_NOTIFY=        1;     {Notify app that next volume will be unpacked}
 
   {Packing flags}
 
   {For PackFiles}
   PK_PACK_MOVE_FILES=   1;    {Delete original after packing}
   PK_PACK_SAVE_PATHS=   2;    {Save path names of files}
 
   {Returned by GetPackCaps}
   PK_CAPS_NEW=          1;    {Can create new archives}
   PK_CAPS_MODIFY=       2;    {Can modify exisiting archives}
   PK_CAPS_MULTIPLE=     4;    {Archive can contain multiple files}
   PK_CAPS_DELETE=       8;    {Can delete files}
   PK_CAPS_OPTIONS=     16;    {Supports the options dialogbox}
   PK_CAPS_MEMPACK=     32;    {Supports packing in memory}
   PK_CAPS_BY_CONTENT=  64;    {Detect archive type by content}
 
   PK_CAPS_SEARCHTEXT= 128;    {Allow searching for text in archives
                               { created with this plugin}
   PK_CAPS_HIDE=       256;    { Show as normal files (hide packer icon) }
                               { open with Ctrl+PgDn, not Enter }
 
   {Flags for packing in memory}
   MEM_OPTIONS_WANTHEADERS=1;  {Return archive headers with packed data}
 
   {Errors returned by PackToMem}
   MEMPACK_OK=           0;    {Function call finished OK, but there is more data}
 
   MEMPACK_DONE=         1;    {Function call finished OK, there is no more data}
 
 type
   {Definition of callback functions called by the DLL}
   {Ask to swap disk for multi-volume archive}
   PChangeVolProc=^TChangeVolProc;
   TChangeVolProc=function(ArcName:pchar;Mode:longint):longint; stdcall;
   {Notify that data is processed - used for progress dialog}
   PProcessDataProc=^TProcessDataProc;
   TProcessDataProc=function(FileName:pchar;Size:longint):longint; stdcall;
 
 type
   THeaderData=packed record
     ArcName:array [0..259] of char;
     FileName:array [0..259] of char;
     Flags,
     PackSize,
     UnpSize,
     HostOS,
     FileCRC,
     FileTime,
     UnpVer,
     Method,
     FileAttr:longint;
     CmtBuf:pchar;
     CmtBufSize,
     CmtSize,
     CmtState:longint;
   end;
 
   tOpenArchiveData=packed record
     ArcName:pchar;
     OpenMode,
     OpenResult:longint;
     CmtBuf:pchar;
     CmtBufSize,
     CmtSize,
     CmtState:longint;
   end;
 
   tPackDefaultParamStruct=record
 
     size,
     PluginInterfaceVersionLow,
     PluginInterfaceVersionHi:longint;
     DefaultIniName:array[0..MAX_PATH-1] of char;
   end;
   pPackDefaultParamStruct=^tPackDefaultParamStruct;
 
 implementation
 
 end.

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