Unzip an Encrypted Zip

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

Download: Chilkat .NET Assemblies

Dim zip As New Chilkat.Zip()

Dim success As Boolean

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


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

success = zip.OpenZip("encrypted.zip")
If (success <> true) 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