用VB.NET編寫AutoCAD2005的DLL程序:
在Visual Studio.NET中建立一個VB工程,選用類庫(ClassLibrary),
添加引用,瀏覽找到AutoCAD2005目錄下的acdbmgd.dll和acmgd.dll文件,
在代碼類中加入如下代碼:

Imports Autodesk.AutoCAD.ApplicationServices
Imports Autodesk.AutoCAD.DatabaseServices
Imports Autodesk.AutoCAD.Runtime

Public Class Class1
    <CommandMethod("test")> _
    Public Shared Sub MyTestCmd()
        MsgBox("Hello World!")
    End Sub
End Class

編譯,
在AutoCAD2005中,用NETLOAD命令加載編譯后的DLL文件,
在AutoCAD2005命令行中鍵入'TEST'運行.

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ObjectARX Managed Wrapper Classes

(1)在AutoCAD2005中,ObjectARX分成了兩類,一類是原來的ObjectARX庫,另一類是ObjectARX Managed Managed Wrapper Classes.
(2)ObjectARX Managed Wrapper Classes存放在acdbmgd.dll和acmgd.dll中. "mgd"即"Managed".
(3)ObjectARX與ObjectARX Managed Wrapper Classes的映射關系:
   AcDb Autodesk.AutoCAD.DatabaseServices
   AcRx Autodesk.AutoCAD.Runtime
   AcEd Autodesk.AutoCAD.ApplicationServices
   AcUt Autodesk.AutoCAD.DatabaseServices, Autodesk.AutoCAD.ApplicationServices 
   AcCm Autodesk.AutoCAD.Colors
   AcGe Autodesk.AutoCAD.Geometry
   AcGi Autodesk.AutoCAD.GraphicsInterface
   AcLy Autodesk.AutoCAD.LayerManager
   AcPl Autodesk.AutoCAD.PlottingServices
(4)二者有很多不同之處,原來ObjectARX中的全局函數,被打包到一些新的類里邊,成了這些類的方法或屬性,而反應器則被Events替代了.
(5)注冊命令時,我們使用了Public Shared Sub MyTextCmd(),這個Shared關鍵字,表明這個命令是static的,而不是instance的.所謂instance的命令,如果你打開3個dwg文件,那么你所注冊的命令將會有3個copy,每個文檔都有自己的copy,這樣就不會發生變量沖突.