Visual FoxPro

Compress Bytes

See more Compression Examples

Demonstrates how to compress binary data. Visual FoxPro

LOCAL lnSuccess
LOCAL loFac
LOCAL loFileBytes
LOCAL loCompress
LOCAL loCompressedBytes

lnSuccess = 0

* This example assumes the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

loFac = CreateObject('Chilkat.FileAccess')

loFileBytes = loFac.ReadEntireFile("qa_data/bmp/big.bmp")
IF (loFac.LastMethodSuccess <> 1) THEN
    ? loFac.LastErrorText
    RELEASE loFac
    CANCEL
ENDIF

loCompress = CreateObject('Chilkat.Compression')
loCompress.Algorithm = "deflate"

loCompressedBytes = loCompress.CompressBytes(loFileBytes)
IF (loCompress.LastMethodSuccess <> 1) THEN
    ? loCompress.LastErrorText
    RELEASE loFac
    RELEASE loCompress
    CANCEL
ENDIF

lnSuccess = loFac.WriteEntireFile("qa_output/compressedBmp.dat",loCompressedBytes)
IF (loFac.LastMethodSuccess <> 1) THEN
    ? loFac.LastErrorText
    RELEASE loFac
    RELEASE loCompress
    CANCEL
ENDIF

RELEASE loFac
RELEASE loCompress