Need to open a form in Access from a visual basic exe

I Need to be able to open a form in an Access 2007 database from a vb form.
The database WILL already be open, but could be minimized or maximized when the vb form code runs.
So I need specific code to connect to the database and then open the form.
Here's kind of what I'm after, but of course it doesn't work:

Dim Acc As Object, db As Object
Dim strFullPath As String
strFullPath = strDir & "Database Name.accdb"
Set Acc = CreateObject("Access.Application")
Set db = Acc.application.DBEngine.Workspaces(strFullPath)
db.DoCmd.Openform "Name of Access Form"
Set db = Nothing
Set Acc = Nothing