I've just installed MapPoint2004 on our Windows 2003 Server (64 Bit edition) and it has installed successfully and is working correctly . I have also installed a bespoke VB.Net application which uses the MP ActiveX Control. As soon as the application tries to create an instance of MapPoint it is falling over with a 'CLASS NOT REGISTERED' error.

The control is definitely registered...the interesting bit in the exception message (which I've posted below) is the parameter called context which is an int32. Could this be an int64 on Windows 64 Bit? or is this a red herring?

Has anyone else managed to use the active x control on a 64 bit version of windows

Thanks

Ian





See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.Runtime.InteropServices.COMException (0x80040154): Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))
at System.Windows.Forms.UnsafeNativeMethods.CoCreateI nstance(Guid& clsid, Object punkOuter, Int32 context, Guid& iid)
at System.Windows.Forms.AxHost.CreateWithoutLicense(G uid clsid)
at System.Windows.Forms.AxHost.CreateWithLicense(Stri ng license, Guid clsid)
at System.Windows.Forms.AxHost.CreateInstanceCore(Gui d clsid)
at System.Windows.Forms.AxHost.CreateInstance()
at System.Windows.Forms.AxHost.GetOcxCreate()
at System.Windows.Forms.AxHost.TransitionUpTo(Int32 state)
at System.Windows.Forms.AxHost.CreateHandle()
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
at System.Windows.Forms.AxHost.EndInit()
at MapPoint64.Form1.InitializeComponent()
at MapPoint64.Form1..ctor()
at MapPoint64.frmStart.Button1_Click(Object sender, EventArgs e)
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventAr gs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.W ndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINDOWS/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll
----------------------------------------
MapPoint64
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files%20(x86)/Microsoft%20MapPoint%20Europe/MapPoint64.exe
----------------------------------------
Microsoft.VisualBasic
Assembly Version: 8.0.0.0
Win32 Version: 8.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Microsoft.VisualBasic/8.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll
----------------------------------------
System
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Windows.Forms
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Runtime.Remoting
Assembly Version: 2.0.0.0
Win32 Version: 2.0.50727.42 (RTM.050727-4200)
CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Runtime.Remoting/2.0.0.0__b77a5c561934e089/System.Runtime.Remoting.dll
----------------------------------------
AxInterop.MapPoint
Assembly Version: 1.0.0.0
Win32 Version: 1.0.0.0
CodeBase: file:///C:/Program%20Files%20(x86)/Microsoft%20MapPoint%20Europe/AxInterop.MapPoint.DLL
----------------------------------------

I found answer in microsoft.public.mappoint discussion group:

Your problem may be that 64 bit applications
(processes) cannot load 32 bit DLLs, which the MapPoint OCX is.

To check if this is the problem, right-click on your project in
Solution Explorer and select "Properties". Switch to the "Build"
tab. Under "Platform Target", select
"x86" instead of "Any CPU" (or indeed x64 or Itanium). Rebuild.

This will prevent the .NET Jitter to try and compile your application
into a 64 bit executable which has trouble loading a 32 bit OCX.

(Compiling the app on 32 bit XP does not help, as the jitter decides
at runtime - on the 64 bit target machine - which native code to
create from the IL you compiled on the 32 machine.)

Regards,
Gilles [MVP].

Hi,

Thank you for the feedback as it will benefit many others !