NSLeftMouseUpMask A mask for left mouse-up events. Declarationstatic const NSEventMask NSLeftMouseUpMask; See AlsoDeprecated TypesNSLeftMouseDownMaskNSRightMouseDownMaskNSRightMouseUpMaskNSOtherMouseDownMaskNSOtherMouseUpMaskNSMouseMovedMaskNSLeftMouseDraggedMaskNSRightMouseDraggedMaskNSOtherMouseDraggedMaskNSMouseEnteredMaskNSMouseExitedMaskNSCursorUpdateMaskNSKeyDownMaskNSKeyUpMaskNSFlagsChangedMask