转自: https://blog.csdn.net/qwertyupoiuytr/article/details/53999369
InternetAPI Error Codes
12001 - Outof Handles
12002 -Timeout
12003 -Extended Error
12004 -Internal Error
12005 -Invalid URL
12006 -Unrecognized Scheme
12007 -Name Not Resolved
12008 -Protocol Not Found
12009 -Invalid Option
12010 - BadOption Length
12011 -Option not Settable
12012 -Shutdown
12013 -Incorrect User Name
12014 -Incorrect Password
12015 -Login Failure
12016 -Invalid Option
12017 -Operation Cancelled
12018 -Incorrect Handle Type
12019 -Inccorect Handle State
12020 - NotProxy Request
12021 -Registry Value Not Found
12022 - BadRegistry Parameter
12023 - NoDirect Access
12024 - NoContent
12025 - NoCallback
12026 -Request Pending
12027 -Incorrect Format
12028 -Item Not Found
12029 -Cannot Connect
12030 -Connection Aborted
12031 -Connection Reset
12032 -Force Retry
12033 -Invalid Proxy Request
12034 -Need UI
12035 - NotDefined in WinInet
12036 -Handle Exists
12037 - SeeCert Date Invalid
12038 - SeeCert CN Invalid
12039 -HTTP to HTTPS on Redir
12040 -HTTPs to HTTP on Redir
12041 -Mixed Security
12042 - ChgPost is Non Secure
12043 -Post is Non Secure
12044 -Client Auth Cert Needed
12045 -Invalid CA (Cert)
12046 -Client Auth Not Setup
12047 -Async Thread Failed
12048 -Redirect Scheme Changed
12049 -Dialog Pending
12050 -Retry Dialog
12052 -Https Http Submit Redir
12053 -Insert Cdrom
12171 -Failed DueToSecurityCheck
FTP APIError Codes
12110 -Transfer in Progress
12111 - FTPDropped
GopherAPI Error Codes
12130 -Protocol Error
12131 - NotFile
12132 -Data Error
12133 - Endof Data
12134 -Invalid Locator
12135 -Invalid Locator Type
12136 - NotGopher Plus
12137 -Attribute Not Found
12138 -Unknown Locator
HTTP APIError Codes
12150 -Header Not Found
12151 -Downlevel Server
12152 -Invalid Server Response
12153 -Invalid Header
12154 -Invalid Query Request
12155 -Header Already Exists
12156 -Redirect Failed
12157 -Security Channel Error
12158 -Unable to Cache File
12159 -TCP/IP not installed
12160 - NotRedirected
12161 -Cookie Needs Confirmation
12162 -Cookie Declined
12168 -Redirect Needs Confirmation
AdditionalInternet API Error Codes
12157 -Security Channel Error
12158 -Unable To Cache File
12159 -Tcpip Not Installed
12163 -Disconnected
12164 -Server Unreachable
12165 -Proxy Server Unreachable
12166 - BadAuto Proxy Script
12167 -Unable To Download Script
12169 - SecInvalid Cert
12170 - SecCert Revoked