win32inet.InternetSetOption

Option	Type of input object
INTERNET_OPTION_CALLBACK	Python function called on status change
INTERNET_OPTION_CONTEXT_VALUE	Any Python object to be passed to callback function
INTERNET_OPTION_SEND_TIMEOUT	Int - timeout in millseconds
INTERNET_OPTION_CONTROL_SEND_TIMEOUT	Int - timeout in millseconds
INTERNET_OPTION_RECEIVE_TIMEOUT	Int - timeout in millseconds
INTERNET_OPTION_CONTROL_RECEIVE_TIMEOUT	Int - timeout in millseconds
INTERNET_OPTION_CODEPAGE	Int - Codepage of host part of URL
INTERNET_OPTION_CODEPAGE_PATH	Codepage for URL
INTERNET_OPTION_CODEPAGE_EXTRA	Int - Codepage for path part of URL
INTERNET_OPTION_CONNECT_RETRIES	Int - Number of time to try to reconnect to host
INTERNET_OPTION_CONNECT_TIMEOUT	Int - Connection timeout in milliseconds
INTERNET_OPTION_CONNECTED_STATE	Int - Connection state, INTERNET_STATE_*
INTERNET_OPTION_ERROR_MASK	Int, combination of INTERNET_ERROR_MASK_*
INTERNET_OPTION_FROM_CACHE_TIMEOUT	Int - Timeout in ms before cached copy is used
INTERNET_OPTION_IDN	Int, INTERNET_FLAG_IDN_*
INTERNET_OPTION_MAX_CONNS_PER_1_0_SERVER	Int
INTERNET_OPTION_MAX_CONNS_PER_SERVER	Int
INTERNET_OPTION_READ_BUFFER_SIZE	Int
INTERNET_OPTION_WRITE_BUFFER_SIZE	Int
INTERNET_OPTION_REQUEST_PRIORITY	Int
INTERNET_OPTION_DIGEST_AUTH_UNLOAD	None
INTERNET_OPTION_END_BROWSER_SESSION	None
INTERNET_OPTION_REFRESH	None
INTERNET_OPTION_RESET_URLCACHE_SESSION	None
INTERNET_OPTION_SETTINGS_CHANGED	None
INTERNET_OPTION_BYPASS_EDITED_ENTRY	Boolean
INTERNET_OPTION_HTTP_DECODING	Boolean
INTERNET_OPTION_IGNORE_OFFLINE	Boolean
INTERNET_OPTION_USERNAME	String - Username passed to InternetConnect
INTERNET_OPTION_PASSWORD	String - Password passed to InternetConnect
INTERNET_OPTION_PROXY_PASSWORD	String
INTERNET_OPTION_PROXY_USERNAME	String
INTERNET_OPTION_SECONDARY_CACHE_KEY	String
INTERNET_OPTION_USER_AGENT	String
INTERNET_OPTION_DATAFILE_EXT	String - Extension to use for download cache file
INTERNET_OPTION_PROXY	Dict representing INTERNET_PROXY_INFO struct
INTERNET_OPTION_HTTP_VERSION	Not yet supported - HTTP_VERSION_INFO
INTERNET_OPTION_PER_CONNECTION_OPTION	Not yet supported (INTERNET_PER_CONN_OPTION_LIST)
INTERNET_OPTION_ALTER_IDENTITY	Not supported
INTERNET_OPTION_ASYNC	Not supported
INTERNET_OPTION_ASYNC_ID	Not supported
INTERNET_OPTION_ASYNC_PRIORITY	Not supported
INTERNET_OPTION_CACHE_STREAM_HANDLE	Not supported
INTERNET_OPTION_CALLBACK_FILTER	Not supported
INTERNET_OPTION_CLIENT_CERT_CONTEXT	Not supported
INTERNET_OPTION_DATA_RECEIVE_TIMEOUT	Not supported
INTERNET_OPTION_DATA_SEND_TIMEOUT	Not supported
INTERNET_OPTION_CONNECT_BACKOFF	Not supported
INTERNET_OPTION_CONNECT_TIME	Not supported
INTERNET_OPTION_DISABLE_AUTODIAL	Not supported
INTERNET_OPTION_DISCONNECTED_TIMEOUT	Not supported
INTERNET_OPTION_IDENTITY	Not supported
INTERNET_OPTION_IDLE_STATE	Not supported
INTERNET_OPTION_KEEP_CONNECTION	Not supported
INTERNET_OPTION_LISTEN_TIMEOUT	Not supported
INTERNET_OPTION_OFFLINE_MODE	Not supported
INTERNET_OPTION_OFFLINE_SEMANTICS	Not supported
INTERNET_OPTION_POLICY	Not supported
INTERNET_OPTION_RECEIVE_THROUGHPUT	Not supported
INTERNET_OPTION_REMOVE_IDENTITY	Not supported
INTERNET_OPTION_SEND_THROUGHPUT	Not supported
INTERNET_OPTION_CACHE_TIMESTAMPS	Only valid for InternetQueryOption
INTERNET_OPTION_HANDLE_TYPE	Only valid for InternetQueryOption
INTERNET_OPTION_DATAFILE_NAME	Only valid for InternetQueryOption
INTERNET_OPTION_PARENT_HANDLE	Only valid for InternetQueryOption
INTERNET_OPTION_SECURITY_CERTIFICATE	Only valid for InternetQueryOption
INTERNET_OPTION_SECURITY_CERTIFICATE_STRUCT	Only valid for InternetQueryOption
INTERNET_OPTION_SECURITY_FLAGS	Only valid for InternetQueryOption
INTERNET_OPTION_SECURITY_KEY_BITNESS	Only valid for InternetQueryOption
INTERNET_OPTION_DIAGNOSTIC_SOCKET_INFO	Only valid for InternetQueryOption
INTERNET_OPTION_VERSION	Only valid for InternetQueryOption
INTERNET_OPTION_EXTENDED_ERROR	Only valid for InternetQueryOption
INTERNET_OPTION_REQUEST_FLAGS	Only valid for InternetQueryOption
INTERNET_OPTION_URL	Only valid for InternetQueryOption

Win32 API References