Unzip an Encrypted Zip

Demonstrates how to open an encrypted .zip archive and unzip.

Download Chilkat 32-bit Zip ActiveX (.msi) (includes objects for .zip, .gz, .bz2, and .Z)

Download All 32-bit Chilkat ActiveX Components (.zip)

Download All 64-bit Chilkat ActiveX Components (.zip)

Dim zip As New ChilkatZip2

Dim success As Long

'  Any string unlocks the component for the 1st 30-days.
success = zip.UnlockComponent("Anything for 30-day trial")
If (success <> 1) Then
    MsgBox zip.LastErrorText
    Exit Sub
End If

'  Set the password required for decrypting.
zip.DecryptPassword = "myPassword"

success = zip.OpenZip("encrypted.zip")
If (success <> 1) Then
    MsgBox zip.LastErrorText
    Exit Sub
End If

Dim unzipCount As Long

'  Returns the number of files and directories unzipped.
unzipCount = zip.Unzip("c:/unzipDir")
If (unzipCount < 0) Then
    MsgBox zip.LastErrorText
Else
    MsgBox "Success!"
End If