I developed a speech recognition program using SpSharedRecoContext. The program works but is too slow.  I thought I would change the program to use SpInProcRecoContext which should provide better performance and quality.  I expected the change to be easy with some necessary tweeks. However, I have encountered a problem that I can not understand. I can demonstrate the problem with the following: Imports SpeechLib Dim WithEvents RC As SpInProcRecoContext Private Sub Form1_Load(sender As Object, e As System.EventArgs) Handles Me.Load RC = New SpInProcRecoContext '---- This line causes the following runtime exception: End Sub End Class System.Runtime.InteropServices.COMException was unhandled ErrorCode=-2147201021 Message=Creating an instance of the COM component with CLSID {73AD6842-ACE0-45E8-A4DD-8795881A2C2A} from the IClassFactory failed due to the following error: 80045003. Source=WindowsApplication25 StackTrace: at WindowsApplication25.Form1.Form1_Load(Object sender, EventArgs e) in c:userschuckdocumentsvisual studio 2010ProjectsWindowsApplication25WindowsApplication25Form1.vb:line 7 at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Windows.Forms.Form.OnLoad(EventArgs e) at System.Windows.Forms.Form.OnCreateControl() at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible) at System.Windows.Forms.Control.CreateControl() at System.Windows.Forms.Control.WmShowWindow(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ScrollableControl.WndProc(Message& m) at System.Windows.Forms.ContainerControl.WndProc(Message& m) at System.Windows.Forms.Form.WmShowWindow(Message& m) at System.Windows.Forms.Form.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) InnerException: 80045003 error is un SPERR_UNSUPPORTED_FORMAT ;"The caller has specified an unsupported format. " If I change it to the following using SpSharedRecoContext, I get no runtime errors, and was the bases for my Speech Recognition programs that is working. Imports SpeechLib Dim WithEvents RC As  SpSharedRecoContext Private Sub Form1_Load(sender As Object, e As System.EventArgs) Handles Me.Load RC = New  SpSharedRecoContext End Sub End Class I have researched and have found that others have had similar problems with SpInProcRecoContext, but I found no solutions. I am running Windows 8 on the development system with Visual Studio 2010.  Based on information, I read on line, I removed and reinstalled Visual Studio 2010 and SDK .  I took the runtime and tried it on a Windows 7 system, with the same results.  I download the trial Visual Studio 2012 and got the same error.  I have seen very similar code on the Microsoft web site, so I don't think the issue is with the code. However,  the Microsoft example Set RC = New SpInProcRecoContext Set is used.  When I include Set, VB removes the Set from the code.  I am not sure what that is about. Can anyone provide me some insight on this problem?  Thanks

Software/Hardware used:
Visual Studio 2010 Basic