知识大全 非常有用的操作Internet的API函数

Posted 函数

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非常有用的操作Internet的API函数  以下文字资料是由(全榜网网www.cha138.com)小编为大家搜集整理后发布的内容，让我们赶快一起来看一下吧！

　　必须安装有Winnet dll文件 功能比WINSOCK强大 但MSDN里的说明和例子都是C++的 连VB的都没有 我自己试探出这么一些功能 　　先贴出来供大家参考 　　　　*所有函数如果运行失败 返回 成功返回 或者句柄 　　*参数大部分是用默认的 参数具体内容 查帮助文件　　　　 检查INTERNET是否连通　　DECLARE Integer InternetGetConnectedState IN wininet dll Integer Integer　　InternetGetConnectedState( )　　　　 自动拨号 使用默认的拨号连接 (IE的INTERNET连接设置里必须设置拨号连接 另外还有个InternetDial函数 必须使用拨号连接名称)　　DECLARE Integer InternetAutodial IN wininet dll Integer Integer　　InternetAutodial ( )　　　　 自动中断拨号或者连接　　DECLARE Integer InternetAutodialHangup IN wininet dll Integer　　InternetAutodialHangup( )　　　　 获得一个连接句柄　　Declare Integer InternetOpen IN wininet dll String Integer String String Integer　　lnOpen= internetOpen( MyFtp null null )　　　　 连接到FTP SERVER　　Declare Integer InternetConnect in wininet dll Integer String Integer String String Integer Integer Integer　　lnConn=InternetConnect(lnOpen anonymous )　　　　 下载一个文件 还有不少FTP或者HTTP的操作文件或页面的函数 有兴趣者自己去试　　Declare Integer FtpGetFile in wininet dll Integer String String Integer Integer Integer Integer　　? FtpGetFile(lnConn /bussys/readme txt c:\\Temp\\msreadme txt )　　　　 中断连接　　Declare Integer InternetCloseHandle In wininet dll Integer　　InternetCloseHandle(lnConn)　　　　下面是WININET DLL里大部分的API函数 是用VB格式的声明:　　　　Declare Function GetProcessHeap Lib kernel () As Long　　Declare Function HeapAlloc Lib kernel (ByVal hHeap As Long ByVal dwFlags As Long ByVal dwBytes As Long) As Long　　Declare Function HeapFree Lib kernel (ByVal hHeap As Long ByVal dwFlags As Long lpMem As Any) As Long　　　　Declare Sub CopyMemory Lib kernel Alias RtlMoveMemory ( _　　hpvDest As Any ByVal hpvSource As Long ByVal cbCopy As Long)　　Declare Sub CopyMemory Lib kernel Alias RtlMoveMemory ( _　　hpvDest As Long hpvSource As Any ByVal cbCopy As Long)　　　　Public Const ERROR_NO_MORE_FILES = 　　　　Public Declare Function InternetFindNextFile Lib wininet dll Alias InternetFindNextFileA _　　(ByVal hFind As Long lpvFindData As WIN _FIND_DATA) As Long　　　　Public Declare Function FtpFindFirstFile Lib wininet dll Alias FtpFindFirstFileA _　　(ByVal hFtpSession As Long ByVal lpszSearchFile As String _　　lpFindFileData As WIN _FIND_DATA ByVal dwFlags As Long ByVal dwContent As Long) As Long　　　　Public Declare Function FtpGetFile Lib wininet dll Alias FtpGetFileA _　　(ByVal hFtpSession As Long ByVal lpszRemoteFile As String _　　ByVal lpszNewFile As String ByVal fFailIfExists As Boolean ByVal dwFlagsAndAttributes As Long _　　ByVal dwFlags As Long ByVal dwContext As Long) As Boolean　　　　Public Declare Function FtpPutFile Lib wininet dll Alias FtpPutFileA _　　(ByVal hFtpSession As Long ByVal lpszLocalFile As String _　　ByVal lpszRemoteFile As String _　　ByVal dwFlags As Long ByVal dwContext As Long) As Boolean　　　　Public Declare Function FtpSetCurrentDirectory Lib wininet dll Alias FtpSetCurrentDirectoryA _　　(ByVal hFtpSession As Long ByVal lpszDirectory As String) As Boolean　　Public Declare Function FtpGetCurrentDirectory Lib wininet dll Alias FtpGetCurrentDirectoryA _　　(ByVal hFtpSession As Long ByVal lpszDirectory As String ByRef lpdwCurrentDirectory As Long) As Boolean　　 Initializes an application s use of the Win Internet functions　　Public Declare Function InternetOpen Lib wininet dll Alias InternetOpenA _　　(ByVal sAgent As String ByVal lAccessType As Long ByVal sProxyName As String _　　ByVal sProxyBypass As String ByVal lFlags As Long) As Long　　　　 Opens a HTTP session for a given site 　　Public Declare Function InternetConnect Lib wininet dll Alias InternetConnectA _　　(ByVal hInternetSession As Long ByVal sServerName As String ByVal nServerPort As Integer _　　ByVal sUsername As String ByVal sPassword As String ByVal lService As Long _　　ByVal lFlags As Long ByVal lContext As Long) As Long　　　　Public Declare Function InternetGetLastResponseInfo Lib wininet dll Alias InternetGetLastResponseInfoA ( _　　lpdwError As Long _　　ByVal lpszBuffer As String _　　lpdwBufferLength As Long) As Boolean　　　　 Type of service to access 　　　　 Opens an HTTP request handle 　　Public Declare Function HttpOpenRequest Lib wininet dll Alias HttpOpenRequestA _　　(ByVal hHttpSession As Long ByVal sVerb As String ByVal sObjectName As String ByVal sVersion As String _　　ByVal sReferer As String ByVal something As Long ByVal lFlags As Long ByVal lContext As Long) As Long　　　　 Sends the specified request to the HTTP server 　　Public Declare Function HttpSendRequest Lib wininet dll Alias HttpSendRequestA (ByVal _　　hHttpRequest As Long ByVal sHeaders As String ByVal lHeadersLength As Long ByVal sOptional As _　　String ByVal lOptionalLength As Long) As Integer　　　　　　 Queries for information about an HTTP request 　　Public Declare Function HttpQueryInfo Lib wininet dll Alias HttpQueryInfoA _　　(ByVal hHttpRequest As Long ByVal lInfoLevel As Long ByRef sBuffer As Any _　　ByRef lBufferLength As Long ByRef lIndex As Long) As Integer　　　　 InternetErrorDlg　　Public Declare Function InternetErrorDlg Lib wininet dll _　　(ByVal hWnd As Long ByVal hInternet As Long ByVal dwError As Long ByVal dwFlags As Long ByVal lppvData As Long) As Long　　　　Public Declare Function GetDesktopWindow Lib user dll () As Long　　　　 The possible values for the lInfoLevel parameter include:　　　　 Reads data from a handle opened by the HttpOpenRequest function 　　Public Declare Function InternetReadFile Lib wininet dll _　　(ByVal hFile As Long ByVal sBuffer As String ByVal lNumBytesToRead As Long _　　lNumberOfBytesRead As Long) As Integer　　　　Public Declare Function HttpSendRequestEx Lib wininet dll Alias HttpSendRequestExA _　　(ByVal hHttpRequest As Long lpBuffersIn As INTERNET_BUFFERS ByVal lpBuffersOut As Long _　　ByVal dwFlags As Long ByVal dwContext As Long) As Long　　　　Public Declare Function HttpEndRequest Lib wininet dll Alias HttpEndRequestA _　　(ByVal hHttpRequest As Long ByVal lpBuffersOut As Long _　　ByVal dwFlags As Long ByVal dwContext As Long) As Long　　　　Public Declare Function InternetWriteFile Lib wininet dll _　　(ByVal hFile As Long ByVal sBuffer As String _　　ByVal lNumberOfBytesToRead As Long _　　lNumberOfBytesRead As Long) As Integer　　　　Public Declare Function FtpOpenFile Lib wininet dll Alias _　　 FtpOpenFileA (ByVal hFtpSession As Long _　　ByVal sFileName As String ByVal lAccess As Long _　　ByVal lFlags As Long ByVal lContext As Long) As Long　　Public Declare Function FtpDeleteFile Lib wininet dll _　　Alias FtpDeleteFileA (ByVal hFtpSession As Long _　　ByVal lpszFileName As String) As Boolean　　　　Public Declare Function InternetSetOption Lib wininet dll Alias InternetSetOptionA _　　(ByVal hInternet As Long ByVal lOption As Long ByRef sBuffer As Any ByVal lBufferLength As Long) As Integer　　　　Public Declare Function InternetSetOptionStr Lib wininet dll Alias InternetSetOptionA _　　(ByVal cha138/Article/program/Java/hx/201311/26323

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