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我使用wacom触控板。 经过试验如果我不实例化一个QApplication,就可以收到WM_POINTER。否则我收到一个WM_LBUTTONDOWN。 或者我实例化一个QApplication然后在release也是可以收到WM_POINTERxxxx的,QT内部做了什么了不得的事吗?? QApplication *a = new QApplication(argc, argv); delete a;