Here's what I've got in an Outlook VBA macro, to launch an Outlook
Form... hope it helps:

Sub SendForm()
 Dim myOlApp As Application
 Dim myNameSpace As NameSpace
 Dim myFolder As MAPIFolder
 Dim myItems As Items
 Dim myItem As Object
 Set myOlApp = CreateObject("Outlook.Application")
 Set myNameSpace = myOlApp.GetNamespace("MAPI")
 Set myFolder = _
   myNameSpace.GetDefaultFolder(olFolderInbox)
 Set myItems = myFolder.Items
 Set myItem = myItems.Add("IPM.Note.<yourformnamehere>")
 myItem.Display
 Set myOlApp = Nothing
 Set myNameSpace = Nothing
 Set myFolder = Nothing
 Set myItems = Nothing
 Set myItem = Nothing
End Sub

--
jcf