Type Default Value Read Only Description

[Visual Basic]
false No Whether any proxy servers should re-request items of content.




This property determines whether no-cache is enabled.

Setting this property to true forces any intervening proxy server to re-request the page.

For the MSHTML engine, setting this property to true sets INTERNET_FLAG_PRAGMA_NOCACHE. WinINET will add request header Pragma: no-cache if going through a HTTP/1.0 proxy and request header Cache-Control: no-cache if going through a HTTP/1.1 proxy.

For the Gecko engine, setting this property to true sets the following flags.

  • LOAD_FLAGS_IS_REFRESH — the load should have the semantics of an HTML Meta-refresh tag (i.e., that the cache should be bypassed).
  • LOAD_FLAGS_BYPASS_HISTORY — history should not be updated.
  • LOAD_FLAGS_BYPASS_CACHE — the local web cache should be bypassed (but an intermediate proxy cache could still be used to satisfy the load).
  • LOAD_FLAGS_BYPASS_PROXY — any intermediate proxy caches should be bypassed (i.e., that the content should be loaded from the origin server).