Overwrite file when copying into zip file using Microsoft Shell COM Library - excel

Question

I'm using Microsoft Shell Controls And Automation COM library from VBA. I have a zip file and I am copying a file into the zip file. The problem is that the file already exists and it throws a dialog box which says "There is already a file with the same name in this location do you want to a) Copy And Replace or b) Don't copy". I would like to programmatically say Copy And Replace (overwrite!).
I think the equivalent on the .NET framework has a documentation page at http://msdn.microsoft.com/en-us/library/windows/desktop/ms723207%28v=vs.85%29.aspx
but I have tried a variety of these.
Also, I will accept removing the original item so that the addition succeeds with no problem; sadly I could not find a delete item method.
I am using Windows 8, 64 bit edition. I'm in Excel (14) VBA (7) and the library I'm using is at C:\Windows\SysWOW64\shell32.dll
Here is head of IDL of the type library I'm talking about
// Generated .IDL file (by the OLE/COM Object Viewer)
//
// typelib filename: shell32.dll
[
uuid(50A7E9B0-70EF-11D1-B75A-00A0C90564FE),
version(1.0),
helpstring("Microsoft Shell Controls And Automation")
]
library Shell32
{
// TLib : // TLib : OLE Automation : {00020430-0000-0000-C000-000000000046}

Answer 1

My preferred answer is the use the MoveHere method to move the old one out the way before adding. That way no dialog box is thrown. Thanks all.

Answer 2

Here's how you can delete a file from a zip using Shell:
Sub DeleteFromZip()
Dim fldr, zpath, itm, vrbs, vrb
zpath = "C:\_stuff\test\test.zip"
Set fldr = CreateObject("Shell.Application").Namespace(zpath)
For Each itm In fldr.items
If itm.Name = "IMG_0000322_2014.03.11.jpg" Then
itm.invokeverb "Delete"
Exit For
End If
Next itm
End Sub
This does raise a confirmation dialog though - see this link for how to avoid it:
FolderItem.InvokeVerb("Delete") without confirmation