Visual Basic 6.0

Compress Bytes to Base64 (or any other encoding)

See more Compression Examples

Compresses bytes to base64 or any other encoding. Also decompress to return the original. Visual Basic 6.0

Dim success As Long
success = 0

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

' First create some binary data to compress.
Dim binData As New ChilkatBinData

Dim i As Long
For i = 1 To 16
    success = binData.AppendEncoded("000102030405060708090A0B0C0D0E0F","hex")
Next

Dim compress As New ChilkatCompression
compress.Algorithm = "deflate"
compress.EncodingMode = "base64"

Dim uncompressedBytes() As Byte
uncompressedBytes = binData.GetBinary()

' Compress and return the compressed bytes in base64 format.
Dim compressedBase64 As String
compressedBase64 = compress.CompressBytesENC(uncompressedBytes)
Debug.Print "compressed and base64 encoded: " & compressedBase64

' Compress and return in hex format:
compress.EncodingMode = "hex"
Dim compressedHex As String
compressedHex = compress.CompressBytesENC(uncompressedBytes)
Debug.Print "compressed and hex encoded: " & compressedHex

' Now decompress..
Dim binData2 As New ChilkatBinData

' Decompress the base64..
compress.EncodingMode = "base64"
uncompressedBytes = compress.DecompressBytesENC(compressedBase64)
success = binData2.AppendBinary(uncompressedBytes)
' Show the uncompressed bytes in hex format:
Debug.Print binData2.GetEncoded("hex")
Debug.Print "--"

' Decompress the hex..
compress.EncodingMode = "hex"
uncompressedBytes = compress.DecompressBytesENC(compressedHex)
success = binData2.Clear()
success = binData2.AppendBinary(uncompressedBytes)
' Show the uncompressed bytes in hex format:
Debug.Print binData2.GetEncoded("hex")
Debug.Print "--"