INTERNET_SCHEME_HTTP                   = 1;
 INTERNET_SCHEME_HTTPS                  = 2;
 INTERNET_DEFAULT_HTTP_PORT             = 80;
 INTERNET_DEFAULT_HTTPS_PORT            = 443;
  
 WINHTTP_NO_PROXY_NAME                  = 0;
 WINHTTP_NO_PROXY_BYPASS                = 0;
 WINHTTP_NO_REFERER                     = 0;
 WINHTTP_NO_HEADER_INDEX                = 0;
 WINHTTP_DEFAULT_ACCEPT_TYPES           = 0;
 WINHTTP_ACCESS_TYPE_DEFAULT_PROXY      = 0;
 WINHTTP_HEADER_NAME_BY_INDEX           = 0;
 WINHTTP_NO_ADDITIONAL_HEADERS          = 0;
 WINHTTP_NO_REQUEST_DATA                = 0;
 WINHTTP_ACCESS_TYPE_DEFAULT_PROXY      = 0;
 
 
 WINHTTP_FLAG_ESCAPE_PERCENT         = $00000004;
 WINHTTP_FLAG_NULL_CODEPAGE          = $00000008;
 WINHTTP_FLAG_ESCAPE_DISABLE         = $00000040;
 WINHTTP_FLAG_ESCAPE_DISABLE_QUERY   = $00000080;
 WINHTTP_FLAG_BYPASS_PROXY_CACHE     = $00000100;
 WINHTTP_FLAG_REFRESH                = $00000100;
 WINHTTP_FLAG_SECURE                 = $00800000;
 
  
 WINHTTP_AUTH_TARGET_SERVER             = 0;
 WINHTTP_AUTH_TARGET_PROXY              = 1;
  
 WINHTTP_AUTH_SCHEME_BASIC              = 1;
 WINHTTP_AUTH_SCHEME_NTLM               = 2;
 WINHTTP_AUTH_SCHEME_PASSPORT           = 4;
 WINHTTP_AUTH_SCHEME_DIGEST             = 8;
 WINHTTP_AUTH_SCHEME_NEGOTIATE          = 16;
  
 WINHTTP_OPTION_REDIRECT_POLICY                         = 88;
 WINHTTP_OPTION_REDIRECT_POLICY_NEVER                   = 0;
 WINHTTP_OPTION_REDIRECT_POLICY_DISALLOW_HTTPS_TO_HTTP  = 1;
 WINHTTP_OPTION_REDIRECT_POLICY_ALWAYS                  = 2;
  
 WINHTTP_QUERY_STATUS_CODE              = 19;
 WINHTTP_QUERY_RAW_HEADERS_CRLF         = 22;
 WINHTTP_QUERY_CONTENT_ENCODING         = 29;
 WINHTTP_QUERY_LOCATION                 = 33;
 WINHTTP_QUERY_FLAG_NUMBER              = $20000000;
 WINHTTP_QUERY_CONTENT_LENGTH           = 5;
  
 WINHTTP_OPTION_USERNAME                = $1000;
 WINHTTP_OPTION_PASSWORD                = $1001;
  
 WINHTTP_FLAG_REFRESH                   = $00000100;
 WINHTTP_FLAG_SECURE                    = $00800000;
  
 WINHTTP_ADDREQ_FLAG_ADD                = $20000000;
 WINHTTP_ADDREQ_FLAG_ADD_IF_NEW         = $10000000;
 
 WINHTTP_RETURNTYPE_MEMORY;
 WINHTTP_RETURNTYPE_FILE;