最简单的用工作线程控制有进程条的窗口,主窗口调用后，调用工作线程，并显示模式对话框，并可控制线程的进展——在对话框上有pause和stop按钮-most simple thread work with a process control of the window, the main window to call after call work thread, and displays the dialog, can control the progress of threads-- in a