这是通过一个门禁读卡器进行485转RS232

1、一个 MFC 的多文档（MDI）应用。在父窗口中，我如何检查所有的MDI子窗口是否都已经关闭？如果都关闭了，那么我想在我的主窗口激活一个窗格。2、用 Visual Studio .NET 和 MFC 做一个程序。在程序里，用户要选择一个文件夹，并在其中拷贝文件。我可以调用 OpenFileDialog 让用户选择某个文件，但如何让打开对话框只显示文件夹呢？我见过好多安装程序给出的对话框里只显示文件夹，但我好像找不到这样的标志。-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.

这是关于对话框方面的程序，如动态彩带的添加，工具栏的创佳等-This is the dialog on the procedures, such as the addition of dynamic ribbon, the toolbar so Chuanjia brand

示范如何制作 OLE 组件跨越不同程序间拖放的程序。需要对微软的COM及OLE比较熟悉。 有完整的文档和代码。-demonstration how to make OLE components across different procedures between drag and drop procedure. The need for Microsoft"s COM and OLE more familiar with. A complete documentation and code.

C++编写的支持DirectX的窗体控件，十分具有特色。可以作为其他控件的容器。-C++ control , supports directx

Run a windows form application using a number of dialogue windows

用VB制作的图像旋转程序，可任意设定旋转角度，图像画卷式展开-VB images produced by the rotation procedures, arbitrary rotation angle, image picture-start

一个很实用的配置向导程序源码，值得参考，欢迎引用.-A very useful source configuration wizard, it is also useful, welcome quote.

源码实现了利用多文档视图结构，实现了多个对话框的显示-Realize the use of multi-source view of the structure of the document to achieve a number of dialog box display

本源程序演示了怎样访问View类中的公共变量！-The source code to demonstrate how to access View class public variables!

调用vc的active x控件写的个播放器，学的比较简单， 只是做调试用的。-call vc active x control of the write-player, the school is relatively simple, just do the debugging.