说明：  QT 4.7.4自定义按钮button，按钮状态有：正常状态，鼠标移动状态，鼠标按下状态，鼠标释放状态暂定为与正常状态相同。可以设置按钮上文本或不显示文本，按钮自适应图片大小或图片自适应按钮大小，使能/禁用按钮等操作。如果安装了QT for VS2008也可以直接使用VS2008打开，否则使用Qt crater打开。
(QT 4.7.4 Custom Buttons button, the button state are: normal state, the state moves the mouse, the mouse Pressed state, the state is tentatively scheduled for release the mouse and the normal state the same. You can set the button text or not Text, buttons, adaptive adaptive image size or picture size button to enable/disable the buttons and other operations For. If you installed the QT for VS2008 VS2008 can also use the open, or use the Qt crater opened.)