Disclaimer: I didn't write this, but got if off of the user forums at notes.net. It works really well.
Const APIModule = "NNOTES" ' Windows/32 only
Const NOTE_CLASS_VIEW= &H0008
Declare Function OSPathNetConstruct Lib APIModule Alias "OSPathNetConstruct" _
( Byval NullPort As Long, Byval Server As String, Byval FIle As String, Byval PathNet As String) As Integer
Declare Function NSFDbOpen Lib APIModule Alias "NSFDbOpen" _
( Byval PathName As String, DbHandle As Long) As Integer
Declare Function NSFDbClose Lib APIModule Alias "NSFDbClose" _
( Byval DbHandle As Long) As Integer
Declare Function NIFFindPrivateDesignNote Lib APIModule Alias "NIFFindPrivateDesignNote" _
( Byval hdb As Long, Byval NoteName As String, Byval NoteClass As Integer, NoteID As Long ) As Integer
Sub DeletePrivateView(db As NotesDatabase, vname As String)
' To open a Domino database on a server, use this function to create
' the full path specification, and pass this specification as input to NSFDbOpen
' or NSFDbOpenExtended.
p$ = String(1024, " ")
OSPathNetConstruct 0, db.Server, db.FilePath, p$
' This function takes a pathname to an existing Domino database or database
' template (whether on a Lotus Domino Server or a local database), opens the
' database, and returns a handle to it. All subsequent access to the database is
' carried out via this handle. Use NSFDbClose to close the database file handle
' and deallocate the memory associated with it.
Dim hDB As Long
NSFDbOpen p$, hDB
' Given the name and NOTE_CLASS_xxx of a private design note (form, view,
' folder, helpindex, macro, field, or replication formula ), this function returns the note ID.
' Uses the View or Folder name passed to it - vname.
Dim retNoteID As Long
Dim result As Integer
result = NIFFindPrivateDesignNote(hDB, vname, NOTE_CLASS_VIEW, retNoteID)
'If result is anything other than 0, the Private Design Note could not be found
If result = 0 Then
Dim doc As NotesDocument
' Get the Private View or Folder by its NoteID
Set doc = db.GetDocumentByID( Hex$(retNoteID) )
Call doc.Remove( True )
Print "Removing : " & vname
End If
' This function closes a previously opened database.
NSFDbClose hDB
End Sub