VC设置代理方法

 

参考文章:

1. VC 设置代理
2. Setting and Retrieving Internet Options
3. Change Internet Proxy settings
4. http://support.microsoft.com/kb/226473
5. http://bbs.csdn.net/topics/310192443

Setting Connection Options

In Internet Explorer 5 and later, Internet options can be set for on a specific connection. Previously, all connections shared the same Internet option settings. To set options for a particular connection:

1. Create an INTERNET_PER_CONN_OPTION_LIST structure.
2. Allocate the memory for the individual Internet options that you want to set for the connection.
3. Set the options in INTERNET_PER_CONN_OPTION structures.
4. Set the options using InternetSetOption.

BOOL SetConnectionOptions()
{
    INTERNET_PER_CONN_OPTION_LIST list;
    BOOL    bReturn;
    DWORD   dwBufSize = sizeof(list);

    // Fill the list structure.
    list.dwSize = sizeof(list);

    // NULL == LAN, otherwise connectoid name.
    list.pszConnection = NULL;

    // Set three options.
    list.dwOptionCount = 3;
    list.pOptions = new INTERNET_PER_CONN_OPTION[3];

    // Ensure that the memory was allocated.
    if(NULL == list.pOptions)
    {
        // Return FALSE if the memory wasn't allocated.
        return FALSE;
    }

    // Set flags.
    list.pOptions[0].dwOption = INTERNET_PER_CONN_FLAGS;
    list.pOptions[0].Value.dwValue = PROXY_TYPE_DIRECT |
        PROXY_TYPE_PROXY;

    // Set proxy name.
    list.pOptions[1].dwOption = INTERNET_PER_CONN_PROXY_SERVER;
    list.pOptions[1].Value.pszValue = TEXT("http://proxy:80");

    // Set proxy override.
    list.pOptions[2].dwOption = INTERNET_PER_CONN_PROXY_BYPASS;
    list.pOptions[2].Value.pszValue = TEXT("local");

    // Set the options on the connection.
    bReturn = InternetSetOption(NULL,
        INTERNET_OPTION_PER_CONNECTION_OPTION, &list, dwBufSize);

    // Free the allocated memory.
    delete [] list.pOptions;

    return bReturn;
}