| IsRectEmpty(NativeRectangle) | determines whether the specified NativeRectangle is empty. An empty NativeRectangle is one that has no area; that is, the coordinate of the right side is less than or equal to the coordinate of the left side, or the coordinate of the bottom side is less than or equal to the coordinate of the top side. |
| IsRectEmpty(Rectangle) | determines whether the specified NativeRectangle is empty. An empty NativeRectangle is one that has no area; that is, the coordinate of the right side is less than or equal to the coordinate of the left side, or the coordinate of the bottom side is less than or equal to the coordinate of the top side. |