---
title: Required Window List Keys
framework: coregraphics
role: collectionGroup
role_heading: API Collection
path: coregraphics/required-window-list-keys
---

# Required Window List Keys

The keys that are guaranteed to be available in a window’s information dictionary.

## Topics

### Constants

- [kCGWindowNumber](coregraphics/kcgwindownumber.md)
- [kCGWindowStoreType](coregraphics/kcgwindowstoretype.md)
- [kCGWindowLayer](coregraphics/kcgwindowlayer.md)
- [kCGWindowBounds](coregraphics/kcgwindowbounds.md)
- [kCGWindowSharingState](coregraphics/kcgwindowsharingstate.md)
- [kCGWindowAlpha](coregraphics/kcgwindowalpha.md)
- [kCGWindowOwnerPID](coregraphics/kcgwindowownerpid.md)
- [kCGWindowMemoryUsage](coregraphics/kcgwindowmemoryusage.md)

## See Also

### Constants

- [Window Sharing Constants](coregraphics/window-sharing-constants.md)
- [Backing Store Types](coregraphics/backing-store-types.md)
- [Window List Option Constants](coregraphics/window-list-option-constants.md)
- [Window Image Types](coregraphics/window-image-types.md)
- [CGWindowID Encoding Type](coregraphics/cgwindowid-encoding-type.md)
- [Null Window](coregraphics/null-window.md)
- [Window Sharing Encoding Type](coregraphics/window-sharing-encoding-type.md)
- [Window Backing Encoding Type](coregraphics/window-backing-encoding-type.md)
- [Optional Window List Keys](coregraphics/optional-window-list-keys.md)