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CryptGetUserKey (advapi32)
The CryptGetUserKey function retrieves a handle of one of a user's two public/private key pairs. This function is used only by the owner of the public/private key pairs and only when the handle of a cryptographic service provider (CSP) and its associated key container is available. If the CSP handle is not available and the user's certificate is, use CryptAcquireCertificatePrivateKey.

C# Signature:

    [DllImport("advapi32.dll", SetLastError=true)]
    public static extern bool CryptGetUserKey(IntPtr hProv, uint dwKeySpec, ref IntPtr hKey);

VB Signature:

Declare Function CryptGetUserKey Lib "advapi32.dll" (TODO) As TODO

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