测试点的坐标依据全局坐标给出。
The coordinates of the point to be tested are given in world coordinates.
最后，这段代码将菜单控件移动到位于标签控件下面的全局坐标中。
Finally, this code moves the menu control to a global coordinate that is just below the label control.
要将控件准确地放置在标签的下面，您需要将所需的位置转换为全局坐标。
To place such a control exactly below the label, you need to translate the desired location to global coordinates.
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