Application: HelloRevit
Revit Platform: All
Revit Version: 2009.0
First Released For: 8.0
Last Modified: 02/26/2008
Modified By: CL Autodesk
Programming Language: VB.NET
Skill Level: Beginning
Category: Mechanism (hello)
Type: ExternalCommand

Subject: How to use external command.
Summary: 
This sample demonstrates how to add a command to Revit.  

Classes: 
Autodesk.Revit.IExternalCommand  

Project Files: 
HelloRevit.vb
This file contains two classes named Command and CommandForm.  They both inherit from IExternalCommmand interface and simply show how to implement the IExternalCommmand interface. 

HelloRevitForm.vb
This file contains a Form class which shows a simple dialog.

Description: 
This sample simply shows how to add a command to Revit.  Just follow the following steps:
-	Define a class inherits from IExternalCommmand interface.
-	Implement the Execute method of IExternalCommmand.

Instructions: 
1.	Open Revit.
2.	Run this command.