代码说明： 进度条，由ms COMCTL32.DLL提供 TdfsExtProgressBar .TdfsExtProgressBar is progress bar control that enables access to the new vertical and smooth style types and the large range values (32-bit) provided by the updated progress bar control. The updated progress bar is provided in the COMCTL32.DLL file that comes with Microsoft's new internet software. Full source code is provided. If you do not yet have the updated COMCTL32.DLL, you will need to download it from Microsoft as well.

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