Connect to the internet: Difference between revisions

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This function attempts to make a connection to the internet if there is
This function attempts to make a connection to the internet if there is
no connection available.
no connection available.
[https://web.archive.org/web/20050710024817/http://support.microsoft.com/kb/q242558/ Internet Explorer < v5 only reports the status of the default Internet connectoid]. If a nondefault connectoid is connected, InternetGetConnectedState always returns FALSE (unless a LAN connection is used).
On Windows Vista and later it is [https://web.archive.org/web/20120819160618/http://msdn.microsoft.com:80/en-us/library/windows/desktop/aa384702(v=vs.85).aspx#2 recommended] that you call INetworkListManager::GetConnectivity() instead.


== The Function ==
== The Function ==

Latest revision as of 17:35, 30 January 2019

Author: joost (talk, contrib)


Description

This function attempts to make a connection to the internet if there is no connection available.

Internet Explorer < v5 only reports the status of the default Internet connectoid. If a nondefault connectoid is connected, InternetGetConnectedState always returns FALSE (unless a LAN connection is used).

On Windows Vista and later it is recommended that you call INetworkListManager::GetConnectivity() instead.

The Function

 ; ConnectInternet (uses Dialer plugin)
 ; Written by Joost Verburg 
 ;
 ; This function attempts to make a connection to the internet if there is
 ; no connection available. If you are not sure that a system using the
 ; installer has an active internet connection, call this function before
 ; downloading files with NSISdl.
 ; 
 ; The function requires Internet Explorer 3, but asks to connect manually
 ; if IE3 is not installed.
 
 Function ConnectInternet
 
   Push $R0
 
     ClearErrors
     Dialer::AttemptConnect
     IfErrors noie3
 
     Pop $R0
     StrCmp $R0 "online" connected
       MessageBox MB_OK|MB_ICONSTOP "Cannot connect to the internet."
       Quit ;This will quit the installer. \
             You might want to add your own error handling.
 
     noie3:
 
     ; IE3 not installed
     MessageBox MB_OK|MB_ICONINFORMATION \
     "Please connect to the internet now."
 
     connected:
 
   Pop $R0
 
 FunctionEnd