WinInet Error Codes
The Microsoft Win32 Internet (WinInet) API provides stand-alone applications with easy access to standard Internet protocols such as FTP and HTTP.
The following is a list of error codes returned by the Microsoft Win32 Internet (WinInet) API functions. For more information, see the current MSDN documentation.
Code | Error Message/Description |
12001 |
ERROR_INTERNET_OUT_OF_HANDLES No more handles could be generated at this time. |
12002 |
ERROR_INTERNET_TIMEOUT The request has timed out. |
12003 |
ERROR_INTERNET_EXTENDED_ERROR An extended error was returned from the server. This is typically a string or buffer containing a verbose error message. Call InternetGetLastResponseInfo to retrieve the error text. |
12004 |
ERROR_INTERNET_INTERNAL_ERROR An internal error has occurred. |
12005 |
ERROR_INTERNET_INVALID_URL The URL is invalid. |
12006 |
ERROR_INTERNET_UNRECOGNIZED_SCHEME The URL scheme could not be recognized or is not supported. |
12007 |
ERROR_INTERNET_NAME_NOT_RESOLVED The server name could not be resolved. |
12008 |
ERROR_INTERNET_PROTOCOL_NOT_FOUND The requested protocol could not be located. |
12009 |
ERROR_INTERNET_INVALID_OPTION A request to InternetQueryOption or InternetSetOption specified an invalid option value. |
12010 |
ERROR_INTERNET_BAD_OPTION_LENGTH The length of an option supplied to InternetQueryOption or InternetSetOption is incorrect for the type of option specified. |
12011 |
ERROR_INTERNET_OPTION_NOT_SETTABLE The request option cannot be set, only queried. |
12012 |
ERROR_INTERNET_SHUTDOWN The Win32 Internet function support is being shut down or unloaded. |
12013 |
ERROR_INTERNET_INCORRECT_USER_NAME The request to connect and log on to an FTP server could not be completed because the supplied user name is incorrect. |
12014 |
ERROR_INTERNET_INCORRECT_PASSWORD The request to connect and log on to an FTP server could not be completed because the supplied password is incorrect. |
12015 |
ERROR_INTERNET_LOGIN_FAILURE The request to connect to and log on to an FTP server failed. |
12016 |
ERROR_INTERNET_INVALID_OPERATION The requested operation is invalid. |
12017 |
ERROR_INTERNET_OPERATION_CANCELLED The operation was canceled, usually because the handle on which the request was operating was closed before the operation completed. |
12018 |
ERROR_INTERNET_INCORRECT_HANDLE_TYPE The type of handle supplied is incorrect for this operation. |
12019 |
ERROR_INTERNET_INCORRECT_HANDLE_STATE The requested operation cannot be carried out because the handle supplied is not in the correct state. |
12020 |
ERROR_INTERNET_NOT_PROXY_REQUEST The request cannot be made via a proxy. |
12021 |
ERROR_INTERNET_REGISTRY_VALUE_NOT_FOUND A required registry value could not be located. |
12022 |
ERROR_INTERNET_BAD_REGISTRY_PARAMETER A required registry value was located but is an incorrect type or has an invalid value. |
12023 |
ERROR_INTERNET_NO_DIRECT_ACCESS Direct network access cannot be made at this time. |
12024 |
ERROR_INTERNET_NO_CONTEXT An asynchronous request could not be made because a zero context value was supplied. |
12025 |
ERROR_INTERNET_NO_CALLBACK An asynchronous request could not be made because a callback function has not been set. |
12026 |
ERROR_INTERNET_REQUEST_PENDING The required operation could not be completed because one or more requests are pending. |
12027 |
ERROR_INTERNET_INCORRECT_FORMAT The format of the request is invalid. |
12028 |
ERROR_INTERNET_ITEM_NOT_FOUND The requested item could not be located. |
12029 |
ERROR_INTERNET_CANNOT_CONNECT The attempt to connect to the server failed. |
12030 |
ERROR_INTERNET_CONNECTION_ABORTED The connection with the server has been terminated. |
12031 |
ERROR_INTERNET_CONNECTION_RESET The connection with the server has been reset. |
12032 |
ERROR_INTERNET_FORCE_RETRY Calls for the Win32 Internet function to redo the request. |
12033 | ERROR_INTERNET_INVALID_PROXY_REQUEST |
12036 |
ERROR_INTERNET_HANDLE_EXISTS The request failed because the handle already exists. |
12037 | ERROR_INTERNET_SEC_CERT_DATE_INVALID |
12038 | ERROR_INTERNET_SEC_CERT_CN_INVALID |
12039 | ERROR_INTERNET_HTTP_TO_HTTPS_ON_REDIR |
12040 | ERROR_INTERNET_HTTPS_TO_HTTP_ON_REDIR |
12041 |
ERROR_INTERNET_MIXED_SECURITY Indicates that the content is not entirely secure. Some of the content being viewed may have come from unsecured servers. |
12042 | ERROR_INTERNET_CHG_POST_IS_NON_SECURE |
12043 | ERROR_INTERNET_POST_IS_NON_SECURE |
12110 |
ERROR_FTP_TRANSFER_IN_PROGRESS The requested operation cannot be made on the FTP session handle because an operation is already in progress. |
12111 |
ERROR_FTP_DROPPED The FTP operation was not completed because the session was aborted. |
12150 |
ERROR_HTTP_HEADER_NOT_FOUND The requested header could not be located. |
12151 |
ERROR_HTTP_DOWNLEVEL_SERVER The server did not return any headers. |
12152 |
ERROR_HTTP_INVALID_SERVER_RESPONSE The server response could not be parsed. |
12153 |
ERROR_HTTP_INVALID_HEADER The supplied header is invalid. |
12154 |
ERROR_HTTP_INVALID_QUERY_REQUEST The request made to HttpQueryInfo is invalid. |
12155 |
ERROR_HTTP_HEADER_ALREADY_EXISTS The header could not be added because it already exists. |
12156 | ERROR_HTTP_REDIRECT_FAILED |