Description: 1, a MFC multi-document (MDI) applications. In the parent window, how do I check all the MDI child window is already closed? If you were closed, then I think in my main window to activate a pane. 2, with Visual Studio. NET and MFC to do a procedure. In the process, the user must select a folder and copy files in one. I can call the OpenFileDialog to allow the user to choose a file, but how to open the dialog box only shows folders then? I have seen a lot of the installation procedure given in the dialog box shows only folders, but I seem to find such signs.
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