(Visual Basic 6.0) Unzip an AES Encrypted Text File directly into a String Variable

A common need is to unzip from an AES encrypted Zip archive directly into a string variable, such that the unencrypted file never resides on disk, even temporarily. This example shows how to do it.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

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

Dim zip As New ChilkatZip

' This example opens a WinZip-compatible AES encrypted
' .zip that contains a single file: hamlet.xml.

' It decrypts and unzips hamlet.xml directly into a string
' variable.
zip.SetPassword "secret"
Dim success As Long
success = zip.OpenZip("qa_data/hamlet.zip")
If (success <> 1) Then
    Debug.Print zip.LastErrorText
    Exit Sub
End If

Dim entry As ChilkatZipEntry
Set entry = zip.GetEntryByName("hamlet.xml")
If (zip.LastMethodSuccess = 0) Then
    Debug.Print "Failed to find entry in zip"
    Exit Sub
End If

' lineEndingBehavior:
' 0 = leave unchanged.
' 1 = convert all to bare LF's
' 2 = convert all to CRLF's
Dim lineEndingBehavior As Long
lineEndingBehavior = 0
Dim srcCharset As String
srcCharset = "utf-8"
Dim xmlText As String
xmlText = entry.UnzipToString(lineEndingBehavior,srcCharset)
Debug.Print xmlText