–public class Command : IExternalCommand
–{
– public IExternalCommand.Result Execute(
– ExternalCommandData commandData,
– ref string
message,
– ElementSet elements )
– {
– try
– {
– // . . .
– }
– catch(
Exception ex )
– {
– message = ex.ToString();
– return IExternalCommand.Result.Failed;
– }
– return IExternalCommand.Result.Succeeded;
– }
–}