This sample demonstrates feature editing using the control commands in conjunction with the ToolbarControl and MapControl. The AddItem method is used within the Form_Load event to add new feature editing commands to the ToolbarControl with the

tooltip使用实例，处理鼠标悬浮事件后，显示当前鼠标位置-tooltip use cases, handling hover event, display the current mouse position

Qt中的Label无法接收点击事件，该源码实现了QLabel能接受点击事件的标签，且鼠标移入可变色。-Label in the Qt can not receive the click event, the source code to achieve the QLabel to accept the event of the label, and the mouse moved into the color.