Microsoft Win 32 Internet (WinInet) API 提供了独立的应用程序标准的 Internet 协议 （如 Gopher、 FTP 和 HTTP 方便地访问。 WinInet API 抽象化到一个高级别接口即 Win 32 开发人员熟悉的协议。
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以下是由 WinInet 函数返回错误代码的列表：
Code Error Message and Description----- -----------------------------12001 ERROR_INTERNET_OUT_OF_HANDLESNo more handles could be generated at this time.12002 ERROR_INTERNET_TIMEOUTThe request has timed out.12003 ERROR_INTERNET_EXTENDED_ERRORAn extended error was returned from the server. This istypically a string or buffer containing a verbose errormessage. Call InternetGetLastResponseInfo to retrieve theerror text.12004 ERROR_INTERNET_INTERNAL_ERRORAn internal error has occurred.12005 ERROR_INTERNET_INVALID_URLThe URL is invalid.12006 ERROR_INTERNET_UNRECOGNIZED_SCHEMEThe URL scheme could not be recognized or is not supported.12007 ERROR_INTERNET_NAME_NOT_RESOLVEDThe server name could not be resolved.12008 ERROR_INTERNET_PROTOCOL_NOT_FOUNDThe requested protocol could not be located.12009 ERROR_INTERNET_INVALID_OPTIONA request to InternetQueryOption or InternetSetOptionspecified an invalid option value.12010 ERROR_INTERNET_BAD_OPTION_LENGTHThe length of an option supplied to InternetQueryOption orInternetSetOption is incorrect for the type of optionspecified.12011 ERROR_INTERNET_OPTION_NOT_SETTABLEThe request option cannot be set, only queried.12012 ERROR_INTERNET_SHUTDOWNThe Win32 Internet function support is being shut down orunloaded.12013 ERROR_INTERNET_INCORRECT_USER_NAMEThe request to connect and log on to an FTP server couldnot be completed because the supplied user name isincorrect.12014 ERROR_INTERNET_INCORRECT_PASSWORDThe request to connect and log on to an FTP server couldnot be completed because the supplied password isincorrect.12015 ERROR_INTERNET_LOGIN_FAILUREThe request to connect to and log on to an FTP serverfailed.12016 ERROR_INTERNET_INVALID_OPERATIONThe requested operation is invalid.12017 ERROR_INTERNET_OPERATION_CANCELLEDThe operation was canceled, usually because the handle onwhich the request was operating was closed before theoperation completed.12018 ERROR_INTERNET_INCORRECT_HANDLE_TYPEThe type of handle supplied is incorrect for thisoperation.12019 ERROR_INTERNET_INCORRECT_HANDLE_STATEThe requested operation cannot be carried out because thehandle supplied is not in the correct state.12020 ERROR_INTERNET_NOT_PROXY_REQUESTThe request cannot be made via a proxy.12021 ERROR_INTERNET_REGISTRY_VALUE_NOT_FOUNDA required registry value could not be located.12022 ERROR_INTERNET_BAD_REGISTRY_PARAMETERA required registry value was located but is an incorrecttype or has an invalid value.12023 ERROR_INTERNET_NO_DIRECT_ACCESSDirect network access cannot be made at this time.12024 ERROR_INTERNET_NO_CONTEXTAn asynchronous request could not be made because a zerocontext value was supplied.12025 ERROR_INTERNET_NO_CALLBACKAn asynchronous request could not be made because acallback function has not been set.12026 ERROR_INTERNET_REQUEST_PENDINGThe required operation could not be completed because oneor more requests are pending.12027 ERROR_INTERNET_INCORRECT_FORMATThe format of the request is invalid.12028 ERROR_INTERNET_ITEM_NOT_FOUNDThe requested item could not be located.12029 ERROR_INTERNET_CANNOT_CONNECTThe attempt to connect to the server failed.12030 ERROR_INTERNET_CONNECTION_ABORTEDThe connection with the server has been terminated.12031 ERROR_INTERNET_CONNECTION_RESETThe connection with the server has been reset.12032 ERROR_INTERNET_FORCE_RETRYCalls for the Win32 Internet function to redo the request.12033 ERROR_INTERNET_INVALID_PROXY_REQUESTThe request to the proxy was invalid.12036 ERROR_INTERNET_HANDLE_EXISTSThe request failed because the handle already exists.12037 ERROR_INTERNET_SEC_CERT_DATE_INVALIDSSL certificate date that was received from the server isbad. The certificate is expired.12038 ERROR_INTERNET_SEC_CERT_CN_INVALIDSSL certificate common name (host name field) is incorrect.For example, if you entered www.server.com and the commonname on the certificate says www.different.com.12039 ERROR_INTERNET_HTTP_TO_HTTPS_ON_REDIRThe application is moving from a non-SSL to an SSLconnection because of a redirect.12040 ERROR_INTERNET_HTTPS_TO_HTTP_ON_REDIRThe application is moving from an SSL to an non-SSLconnection because of a redirect.12041 ERROR_INTERNET_MIXED_SECURITYIndicates that the content is not entirely secure. Some ofthe content being viewed may have come from unsecuredservers.12042 ERROR_INTERNET_CHG_POST_IS_NON_SECUREThe application is posting and attempting to changemultiple lines of text on a server that is not secure.12043 ERROR_INTERNET_POST_IS_NON_SECUREThe application is posting data to a server that is notsecure.12110 ERROR_FTP_TRANSFER_IN_PROGRESSThe requested operation cannot be made on the FTP sessionhandle because an operation is already in progress.12111 ERROR_FTP_DROPPEDThe FTP operation was not completed because the session wasaborted.12130 ERROR_GOPHER_PROTOCOL_ERRORAn error was detected while parsing data returned from thegopher server.12131 ERROR_GOPHER_NOT_FILEThe request must be made for a file locator.12132 ERROR_GOPHER_DATA_ERRORAn error was detected while receiving data from the gopherserver.12133 ERROR_GOPHER_END_OF_DATAThe end of the data has been reached.12134 ERROR_GOPHER_INVALID_LOCATORThe supplied locator is not valid.12135 ERROR_GOPHER_INCORRECT_LOCATOR_TYPEThe type of the locator is not correct for this operation.12136 ERROR_GOPHER_NOT_GOPHER_PLUSThe requested operation can only be made against a Gopher+server or with a locator that specifies a Gopher+operation.12137 ERROR_GOPHER_ATTRIBUTE_NOT_FOUNDThe requested attribute could not be located.12138 ERROR_GOPHER_UNKNOWN_LOCATORThe locator type is unknown.12150 ERROR_HTTP_HEADER_NOT_FOUNDThe requested header could not be located.12151 ERROR_HTTP_DOWNLEVEL_SERVERThe server did not return any headers.12152 ERROR_HTTP_INVALID_SERVER_RESPONSEThe server response could not be parsed.12153 ERROR_HTTP_INVALID_HEADERThe supplied header is invalid.12154 ERROR_HTTP_INVALID_QUERY_REQUESTThe request made to HttpQueryInfo is invalid.12155 ERROR_HTTP_HEADER_ALREADY_EXISTSThe header could not be added because it already exists.12156 ERROR_HTTP_REDIRECT_FAILEDThe redirection failed because either the scheme changed(for example, HTTP to FTP) or all attempts made to redirectfailed (default is five attempts).
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