Create Password Protected Zip containing a Single File.

Download Chilkat .NET for 2.0 / 3.5 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

Create a password-protected .zip containing a single file. (This uses the older Zip 2.0 encryption scheme, which is weaker and not as secure as AES encryption, which Chilkat Zip also supports.)

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


success = zip.NewZip("test.zip")
If (success <> true) Then
    MsgBox(zip.LastErrorText)
    Exit Sub
End If


zip.SetPassword("secret")
zip.PasswordProtect = true

Dim saveExtraPath As Boolean
saveExtraPath = false
success = zip.AppendOneFileOrDir("c:/temp/hamlet.xml",saveExtraPath)


success = zip.WriteZipAndClose()
If (success <> true) Then
    MsgBox(zip.LastErrorText)
    Exit Sub
End If


MsgBox("Zip Created!")