Unzip a .zip Archive

Demonstrates how to open a .zip archive and unzip. The Unzip method extracts the files and directories from a .zip archive and recreates the directory tree rooted at the directory path passed to 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
    TextBox1.Text = TextBox1.Text & zip.LastErrorText & vbCrLf
    Exit Sub
End If


success = zip.OpenZip("my_files.zip")
If (success <> true) Then
    TextBox1.Text = TextBox1.Text & zip.LastErrorText & vbCrLf
    Exit Sub
End If



Dim unzipCount As Long

'  Returns the number of files and directories unzipped.
'  Unzips to /my_files, re-creating the directory tree
'  from the .zip.
unzipCount = zip.Unzip("/my_files")
If (unzipCount < 0) Then
    TextBox1.Text = TextBox1.Text & zip.LastErrorText & vbCrLf
Else
    MsgBox("Success!")
End If