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Asked: 2026-05-27T14:05:41+00:00

I need to use some functions from the Win32 Crypto API, such as CryptQueryObject.

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I need to use some functions from the Win32 Crypto API, such as CryptQueryObject. The problem is that I also need to compile my program with MingW and the crypto library included is missing some of the functions that I need, like the aformentioned CryptQueryObject. I tried copying the relevant C header definitions, so that the program now compiles, but at link time it fails with undefined reference errors (since mingw’s crypt32.dll doesn’t implement some functions). I tried linking against C:\Windows\System32\crypt32.dll, but it still returns linking errors.

Is there a way to use the entire Crypto API in mingw?

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1 Answer

  1. Editorial Team

    You need to dynamically link to crypt32.dll. You can either do this at runtime
    using Win32 API functions LoadLibrary + GetProcAddress, or at compile time using an import library.

    For runtime binding, MSDN has a good example.

    EDIT: If you need a bunch of API functions not present in MinGW’s headers, go for the import library.

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