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My view is, if you are writing more than one GetDlgItem per year, you are probably not using C++/MFC correctly. Fortunately, there is a better, more elegant, and safer way to get access to controls using MFC.
http://www.flounder.com/getdlgitem.htm
Microsoft does not adequately document the correct way to work with controls. It is left up to the programmer to somehow magically infer the correct way to do this. Unfortunately, all of the evidence suggests that UpdateData is the correct way to handle the problem of accessing control information while working inside a dialog. This is not correct. In fact, it is dangerous to use it. It is simply the wrong way to go about it.
http://www.flounder.com/updatedata.htm
