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Asked: 2026-05-15T14:08:15+00:00

What DLL do I need to reference to access FilerRegister method(s) of the CRegObject

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What DLL do I need to reference to access FilerRegister method(s) of the CRegObject from C#?

    [DllImport("ATL90.DLL")]
    public static extern int FileRegister(string fileName);

And how would I do that in visual studio?

Any help is greatly appreciated! I can’t seem to find the correct DLL. I looked on pinvoke.net, but couldn’t find it.

Thanks!

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1 Answer

  1. Editorial Team

    You can’t. P/Invoke only works with C APIs, it does not work with C++ APIs. Besides, that particular API is implemented in inline C++, it’s not actually included in the ATL DLL.

    I believe the best you could do is write a C++/CLI wrapper and call that from the C# code. Or take the C++ source code (which is included with Visual Studio) and rewrite it in C#.

    If you include more details about why you want to call FileRegister, then maybe there are other alternatives…

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