This property allows you to specify a list of host names or IP Addresses that should not be routed through the proxy server. IOW, this list allows you to directly access the requested domains/IPs bypassing the proxy.

The following information is taken from MSDN on the InternetOpen() function:

**lpszProxyBypass **

Address of a string variable that contains an optional list of host names or IP addresses, or both, that should not be routed through the proxy when dwAccessType is set to INTERNET_OPEN_TYPE_PROXY (3). The list can contain wildcards. Do not use an empty string, because InternetOpen will use it as the proxy bypass list. If this parameter specifies the "" macro as the only entry, the function bypasses any host name that does not contain a period. If dwAccessType is not set to INTERNET_OPEN_TYPE_PROXY, this parameter is ignored and should be set to NULL.

o.cHTTPProxyByPass