# CryptFreeOIDFunctionAddress

```csharp
[DllImport("Crypt32.dll", SetLastError = true)]
public static extern bool CryptFreeOIDFunctionAddress(
   IntPtr hFuncAddr
);
```

Microsoft documentation: [Link](https://docs.microsoft.com/en-us/windows/win32/api/wincrypt/nf-wincrypt-cryptfreeoidfunctionaddress)