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# CGShieldingWindowLevel()

Returns the window level of the shield window for a captured display.

```
func CGShieldingWindowLevel() -> CGWindowLevel
```

## Return Value

The window level of the shield window for a captured display.

## Discussion

This function returns a value that is sometimes used to position a window over the shield window for a captured display. Attempting to position a window over a captured display may be unsuccessful—or it may present undesirable results such as illegible or invisible content—because of interactions between full-screen graphics (such as OpenGL full-screen drawing contexts) and the graphics hardware. Because of these limitations, this technique is not recommended.

---

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