Добавление в автозагрузку

пример для реестра:

    HKEY hKey; 
    char szPath[0x100]; 
    GetModuleFileName(NULL, szPath, sizeof(szPath)); 
    RegCreateKeyEx(HKEY_LOCAL_MACHINE, 
                     "Software\\Microsoft\\Windows\\CurrentVersion\\Run", 
                     NULL, 
                     "", 
                     REG_OPTION_NON_VOLATILE, 
                     KEY_SET_VALUE, 
                     NULL, 
                     &hKey, 
                     NULL); 

    if (hKey) 
    { 
        RegSetValueEx(hKey, "My program", NULL, REG_SZ, (LPBYTE)szPath, strlen(szPath)); 
        RegCloseKey(hKey); 
    }