Returns a hit test code indicating whether a point is contained in the background of the current visual style element.
返回一个命中测试代码，指示某个点是否包含在当前视觉样式元素的背景中。
Returns a hit test code indicating whether the point is contained in the background of the current visual style element and within the specified region.
返回一个命中测试代码，指示该点是否包含在当前视觉样式元素的背景中的指定边界内。
Full coverage was very expensive and difficult to achieve, because we had to hand-inspect our code to determine which lines were and were not hit by the test.
完全的覆盖是非常昂贵的并且很难达到，因为我们必须要手工的检查我们的代码以确定哪一行代码没有被测试覆盖到。
Specifies the hit-test code. A hit test is a test that determines the location of the cursor.
指定了击中测试代码。击中测试用于确定光标的位置。
Specifies the hit-test code. A hit test is a test that determines the location of the cursor.
指定了击中测试代码。击中测试用于确定光标的位置。
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