delegate DecimalData AfArch.AfDal.Gtk.CustomDecimalCloseHandler IAsyncResult  ar  ) 

Handler definition for the custom decimal close method.

See the Nul custom close invocation handler for an example. You'll find it at: nul custom invocation, for its close handler CustomNulCloseHandler.

ar Async object that have to be used to return the invocation result.
The method implementing this handler should return a DecimalData.