// setpreferredCipher.cpp : 
// lib: bcrypt.lib

#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <bcrypt.h>
void main(void)
{
SECURITY_STATUS Status = ERROR_SUCCESS;
LPWSTR wszCiphertop = (L"TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384_P384");
LPWSTR wszCipherbottom = (L"TLS_RSA_WITH_RC4_128_SHA");

Status = BCryptAddContextFunction(CRYPT_LOCAL,L"SSL",NCRYPT_SCHANNEL_INTERFACE,wszCiphertop,CRYPT_PRIORITY_TOP);
printf("\nSet %S on top\n",wszCiphertop);
// Schmuddelkind RC4 wird von manchen Programmen noch gebraucht
Status = BCryptAddContextFunction(CRYPT_LOCAL,L"SSL",NCRYPT_SCHANNEL_INTERFACE,wszCipherbottom,CRYPT_PRIORITY_BOTTOM);
printf("\nSet %S on bottom\n",wszCipherbottom);
}