»Public Function Execute(
_
» ByVal commandData As
Autodesk.Revit.ExternalCommandData, _
» ByRef message As String, _
» ByVal elements As Autodesk.Revit.ElementSet ) _
»_
» As Autodesk.Revit.IExternalCommand.Result _
» Implements Autodesk.Revit.IExternalCommand.Execute
»
» MsgBox("Hello World")
» Return IExternalCommand.Result.Succeeded
»
»End Function