Unzip a Zip File

Download Chilkat .NET for 2.0 / 3.5 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

How to unzip a Zip archive in Visual Basic .NET

        Dim zip As New Chilkat.Zip()

        ' Anything begins the 30-day trial
        Dim unlocked As Boolean
        unlocked = zip.UnlockComponent("30-day trial")
        If (Not unlocked) Then
            MsgBox(zip.LastErrorText)
            Exit Sub
        End If

        Dim success As Boolean
        success = zip.OpenZip("test.zip")

        ' Unzip creating a new subdirectory named "tree"
        ' under the current working directory.
        Dim count As Integer
        count = zip.Unzip("tree")
        If (count = -1) Then
            MsgBox(zip.LastErrorText)
        Else
            MsgBox("Unzipped " + Str(count) + " files and directories")
        End If

    End Sub

Important: The download for this example does not contain the ChilkatDotNet.dll which
must be downloaded and installed separately at http://www.chilkatsoft.com/downloads.asp.
Once installed, add a reference to the DLL in the project by following the instructions at
http://www.example-code.com/vbdotnet/step2.asp