Description: BHO (browser helper object) is a simple ATL COM object, but Internet Explorer will load each time when they run it In other words, that each instance of Internet Explorer will load it. BHO run in Internet Explorer' s address space, can be accessed objects (such as windows, modules, etc.) to perform any operation, and because it is dependent on the browser' s main window, so its lifetime and the lifetime of the browser instance unanimously.
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bho.doc
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