Running AutoCAD VBA from C# .NET

by Fenton Webb

Here’s how to invoke a function Public Sub Test() declared in VBA from .NET; use acedCmd() and run –vbarun

    // how to call VBA from .NET

#if AC2013

    [DllImport("accore.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "acedCmd")]

#else

    [DllImport("acad.exe", CallingConvention = CallingConvention.Cdecl, EntryPoint = "acedCmd")]

#endif

    private static extern int acedCmd(System.IntPtr vlist);

    [CommandMethod("callVBA")]

    public void callVBA()

    {

      ResultBuffer rb = new ResultBuffer();

      // RTSTR = 5005

      rb.Add(new TypedValue(5005, "_.-vbarun"));

      rb.Add(new TypedValue(5005, "test"));

      // start vbarun running 'ThisDrawing.Test()

      acedCmd(rb.UnmanagedObject);

    }