code: def createOverlay(self, pchOverlayKey, pchOverlayName):
          
  
          fn = self.function_table.createOverlay
          pOverlayHandle = VROverlayHandle_t()
          result = fn(pchOverlayKey, pchOverlayName, byref(pOverlayHandle))
          return result, pOverlayHandle
docs: Creates a new named overlay. All overlays start hidden and with default settings.