typedef struct provider_info {
    PQUERYHANDLER pi_R0_1val;
    PQUERYHANDLER pi_R0_allvals;
    PQUERYHANDLER pi_R3_1val;
    PQUERYHANDLER pi_R3_allvals;
    DWORD pi_flags;    
    LPVOID pi_key_context;
}REG_PROVIDER;