如何连接到Internet

; ConnectInternet (uses Dialer plug-in)
; 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