BCryptGenRandom flags

[ChrisDenton]

The dwflags of BCryptGenRandom can be either BCRYPT_RNG_USE_ENTROPY_IN_BUFFER or BCRYPT_USE_SYSTEM_PREFERRED_RNG. It would be nice if this was represented by a type.

Current definitions:

// Windows.Win32.Security.Cryptography.Apis
public unsafe static extern NTSTATUS BCryptGenRandom(
    [Optional][In] BCRYPT_ALG_HANDLE hAlgorithm,
    [Out][MemorySize(BytesParamIndex = 2)] byte* pbBuffer,
    [In] uint cbBuffer,
    [In] uint dwFlags
);
public const uint BCRYPT_RNG_USE_ENTROPY_IN_BUFFER = 1u;
public const uint BCRYPT_USE_SYSTEM_PREFERRED_RNG = 2u;