Create Password Protected Zip containing a Single File.

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)

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.)

set zip = CreateObject("Chilkat.Zip2")

'  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
    WScript.Quit
End If

success = zip.NewZip("test.zip")
If (success <> 1) Then
    MsgBox zip.LastErrorText
    WScript.Quit
End If

zip.SetPassword "secret"
zip.PasswordProtect = 1

saveExtraPath = 0
success = zip.AppendOneFileOrDir("c:/temp/hamlet.xml",saveExtraPath)

success = zip.WriteZipAndClose()
If (success <> 1) Then
    MsgBox zip.LastErrorText
    WScript.Quit
End If

MsgBox "Zip Created!"