I hope this si the right forum.

I am running x64 bit Vista system. I have installed the Remote Server Administration Tools for Vista so that I can get access to the CertAdm.dll that holds the ICertView2 interface to the Microsoft Certificate Server.

That process worked and I can view my remote certificate server. However, I cannot add a the CertAdm.dll/tlb to a project reference. The best that I can determine is this is because I installed (as I had to) the x64 bit administration tools and they did not register the COM interfaces in the WOW 64 registery location for use by 32-bit processes (Visual Studio in this case). Also, if Ibrowse c:\windows\system32 from the add reference dialog in Visual Stdio, it actually displays c:\windows\SysWOW64 instead. (Not a real big surprise.)

The question becomes how can I do development against x64 bit COM objects since I can see no way to add them to a project reference.

To to double check, I repeated this process on a 32 bit machine and the CertAmd 1.0 Type Library appears in the COM tab of the Add Refence dialog as expected.

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Thanks Roy

You'll have to wait for the 64-bit version of Visual Studio. Use the 64-bit version of Tlbimp.exe in the mean time.

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Hans Passant.

You need to change your .NET application to compile as a 64bit application if you want to use the 64bit COM reference. You cannot reference a 64bit COM component from a 32bit application, even if it's running under WOW64 on a 64bit OS.

Just build your application targetting x64 instead of x86, and it should work fine.

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Reed Copsey, Jr. - http://reedcopsey.com

Yes, I understand that a 32 bit application cannot use a 64 bit COM and visa versa. That is not my issue. My issue is that I cannot add the COM reference to the projectviathe Add Reference dialog.(And just to be sure, I did change my appication from Any CPU to 64 bit and that did not help.)

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Thanks Roy

You'll have to wait for the 64-bit version of Visual Studio. Use the 64-bit version of Tlbimp.exe in the mean time.

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Hans Passant.

The information on the existance of a 64 bit version of Tlbimp appears to be just what I needed. Thanks.

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Thanks Roy