I don't think a new window in the same process can lose session information...
>> I don't think a new window in the same process can lose session information...Agree. You need to intercept NewWindow event and provide the IDispatcher interface of a WebBrowser control of the same process.
To jiangsheng(蒋晟.Net[MVP]) and qqchen79(知秋一叶)说清楚点啊两位
处理WebBrowser的NewWindow2 Event,然后把第一个参数(ppDisp)设置成你自己的In the same process的WebBrowser.
http://user.qzone.qq.com/31767702