the desired command can be viewed and judged, "forward" and "backward" can use _goback

Packet : 364585can_webbrowser.zip filelist
判断webbrowser GoBack与否/
判断webbrowser GoBack与否/Form1.frm
判断webbrowser GoBack与否/Project1.vbp
判断webbrowser GoBack与否/Project1.vbw

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