在设计中，需类与主程序异步传递数据,还不想用消息,因为是c++的程序,de得自己作消息处理,所以想到了回调函数,但此方面的资料太少,一般都是在mfc和dllde的,花了点时间作了此回调函数.实现了数据的同步和异步(类向主程序传递数据)传递-in design, with the main program categories need asynchronous data transfer, but also did not want the news because the process is c, de yourself for the news, so I thought of a callback function, but this information too small, are generally in the dllde mfc and spent time made this callback function. to achieve the data synchronous and asynchronous (main program categories to transfer data) transmission