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LZCopy info  Overview  Group

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 identifying source file

    INT hfDest 

// LZ file handle identifying destination file

   );

Parameters

hfSource
Identifies the source file.
hfDest
Identifies the destination file.

Return Values

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 threadís last-error code.

Here is a list of the LZERROR_* 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.

Remarks

The handles identifying the source and destination files must be retrieved by calling the LZInit or LZOpenFile function.

The preferred function to use for copying files is LZCopy. The CopyLZFile function is provided for compatibility with 16-bit versions of Windows.

If the function succeeds, the file identified by the hfDest parameter is always uncompressed.

See Also

CopyLZFile, LZInit, LZOpenFile 

See also:


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