Create a menu (if you don't want it to be displayed in the top menubar, set the top level menu object's visible propertie to false).

Lets say mnuMyMenu is your top level menu object:

Code:
Private Sub Form_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)

If Button = 2 Then
    PopupMenu mnuMymenu
End If

End Sub
Would display all menu objects under the mnuMyMenu hiearchy (That have a visible property set to true that is..)