| Platform SDK: Files and I/O |
The LZCopy function copies a source file to a destination file. If the source file is compressed with the Microsoft File Compression Utility (COMPRESS.EXE), this function creates a decompressed destination file. If the source file is not compressed, this function duplicates the original file.
LONG LZCopy( INT hfSource, // LZ file handle for source file INT hfDest // LZ file handle for destination file );
If the function succeeds, the return value specifies the size, in bytes, of the destination file.
If the function fails, the return value is an LZERROR_* code. These codes have values less than zero. Note that LZCopy calls neither SetLastError nor SetLastErrorEx; thus, its failure does not affect a thread's last-error code.
The following is a list of error codes that LZCopy can return upon failure.
| Value | Meaning |
|---|---|
| LZERROR_BADINHANDLE | The handle identifying the source file is not valid. The file cannot be read. |
| LZERROR_BADOUTHANDLE | The handle identifying the destination file is not valid. The file cannot be written. |
| LZERROR_GLOBALLOC | The maximum number of open compressed files has been exceeded or local memory cannot be allocated. |
| LZERROR_GLOBLOCK | The LZ file handle cannot be locked down. |
| LZERROR_READ | The source file format is not valid. |
There is no extended error information for this function; do not call GetLastError.
The handles identifying the source and destination files must be retrieved by calling the LZInit or LZOpenFile function.
If the function succeeds, the file identified by the hfDest parameter is always uncompressed.
Windows NT/2000: Requires Windows NT 3.1 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Lzexpand.h; include Windows.h.
Library: Use Lz32.lib.
Data Decompression Library Overview, Data Decompression Library Functions, LZInit, LZOpenFile