Description

Layer Option Bits (LOB_*) define bitwise flags used in TCustomLayer.LayerOptions to control visibility, repainting, overlay drawing, and mouse message capture behavior.

Constants Table

Constant	Value	Description
LOB_VISIBLE	$80000000	Controls layer visibility. When set, the layer is rendered during paint cycles.
LOB_GDI_OVERLAY	$40000000	Indicates that the layer performs drawing when its owner control draws GDI overlays.
LOB_MOUSE_EVENTS	$20000000	Specifies whether the layer responds to mouse messages and hit testing.
LOB_NO_UPDATE	$10000000	Disables automatic repainting when layer location or properties change.
LOB_NO_CAPTURE	$08000000	Overrides automatic mouse message capturing when the left mouse button is pressed over the layer. Has no effect if LOB_MOUSE_EVENTS is cleared.
LOB_INVALID	$04000000	Used internally by the repaint optimizer to mark invalidated layer areas.
LOB_FORCE_UPDATE	$02000000	Used internally to force an area repaint when a layer is being hidden.
LOB_RESERVED_24	$01000000	Reserved bit.
LOB_RESERVED_MASK	$FF000000	Bitmask covering all system and option bit flags (bits 24..31).